Iranian peoples

The Iranian peoples or Iranic peoples are a diverse Indo-European ethno-linguistic group that comprise the speakers of the Iranian languages.

Proto-Iranians are believed to have emerged as a separate branch of the Indo-Iranians in Central Asia in the mid 2nd millennium BC. At their peak of expansion in the mid 1st millennium BC, the territory of the Iranian peoples stretched across the Iranian Plateau and the entire Eurasian Steppe from the Great Hungarian Plain in the west to the Ordos Plateau in the east. The Western Iranian Persian Empires came to dominate much of the ancient world from the 6th century BC, leaving an important cultural legacy, while the Eastern Iranian nomads of the steppe played a decisive role in the development of Eurasian nomadism and the Silk Route.

Ancient Iranian peoples who emerged after 1000 BC include the Persians, Parthians, Medes, Scythians, Cimmerians, Alans, Bactrians, Dahae, Massagetae, Khwarezmians, Saka, Sarmatians, Sogdians, Sagartians and other peoples of Central Asia, the Caucasus, Eastern Europe, and the Iranian Plateau.

In the 1st millennium AD, their area of settlement was reduced as a result of Slavic, Germanic, Turkic and Mongol expansions and many being subjected to Slavicisation. The Iranian peoples include Baloch, Kurds, Gilaks, Lurs, Mazanderanis, Ossetians, Pashtuns, Pamiris, Persians, Tajiks, Talysh people, Wakhis and Yaghnobis. Their current distribution spreads across the Iranian plateau, and stretches from the Caucasus in the north to the Persian Gulf in the south, and from Xinjiang in the east to eastern Turkey in the west —a region that is sometimes called the Iranian cultural continent, and represents the extent of the Iranian languages and significant influence of the Iranian peoples through the geopolitical reach of Greater Iran.

Name
The term Iran derives directly from Middle Persian Ērān (𐭠𐭩𐭥𐭠𐭭) and Parthian Aryān. The Middle Iranian terms ērān and aryān are oblique plural forms of gentilic ēr- (in Middle Persian) and ary- (in Parthian), both deriving from Old Persian ariya- (𐎠𐎼𐎡𐎹), Avestan airiia- (𐬀𐬌𐬭𐬌𐬌𐬀), and Proto-Iranian *arya-.

There have been many attempts to qualify the verbal root of ar- in Old Iranian arya-. The following are according to 1957 and later linguists:
 * Emmanuel Laroche (1957): ara- "to fit" ("fitting", "proper"). Old Iranian arya- being descended from Proto-Indo-European , meaning "(skillfully) assembler".
 * Georges Dumézil (1958): ar- "to share" (as a union).
 * Harold Walter Bailey (1959): ar- "to beget" ("born", "nurturing").
 * Émil Benveniste (1969): ar- "to fit" ("companionable").

Unlike the Sanskrit ā́rya- (Aryan), the Old Iranian term has solely an ethnic meaning. Today, the Old Iranian arya- remains in ethno-linguistic names such as Iran, Alan, Ir, and Iron.

In the Iranian languages, the gentilic is attested as a self-identifier included in ancient inscriptions and the literature of Avesta. The earliest epigraphically attested reference to the word arya- occurs in the Bistun Inscription of the 6th century BC. The inscription of Bistun (or Behistun; ) describes itself to have been composed in Arya [language or script]. As is also the case for all other Old Iranian language usage, the arya of the inscription does not signify anything but Iranian.

In royal Old Persian inscriptions, the term arya- appears in three different contexts: In the Dna and Dse, Darius and Xerxes describe themselves as "an Achaemenid, a Persian, son of a Persian, and an Aryan, of Aryan stock". Although Darius the Great called his language arya- ("Iranian"), modern scholars refer to it as Old Persian because it is the ancestor of the modern Persian language.
 * As the name of the language of the Old Persian version of the inscription of Darius I in the Bistun Inscription.
 * As the ethnic background of Darius the Great in inscriptions at Rustam Relief and Susa (Dna, Dse) and the ethnic background of Xerxes I in the inscription from Persepolis (Xph).
 * As the definition of the God of Iranians, Ohrmazd, in the Elamite version of the Bistun Inscription.

The trilingual inscription erected by the command of Shapur I gives a more clear description. The languages used are Parthian, Middle Persian, and Greek. In Greek inscription says "ego ... tou Arianon ethnous despotes eimi", which translates to "I am the king of the kingdom (nation) of the Iranians". In Middle Persian, Shapur says "ērānšahr xwadāy hēm" and in Parthian he says "aryānšahr xwadāy ahēm".

The Avesta clearly uses airiia- as an ethnic name (Videvdat 1; Yasht 13.143–44, etc.), where it appears in expressions such as airyāfi daiŋˊhāvō ("Iranian lands"), airyō šayanəm ("land inhabited by Iranians"), and airyanəm vaējō vaŋhuyāfi dāityayāfi ("Iranian stretch of the good Dāityā"). In the late part of the Avesta (Videvdat 1), one of the mentioned homelands was referred to as Airyan'əm Vaējah which approximately means "expanse of the Iranians". The homeland varied in its geographic range, the area around Herat (Pliny's view) and even the entire expanse of the Iranian plateau (Strabo's designation).

The Old Persian and Avestan evidence is confirmed by the Greek sources. Herodotus, in his Histories, remarks about the Iranian Medes that "Medes were called anciently by all people Arians" (7.62). In Armenian sources, the Parthians, Medes and Persians are collectively referred to as Iranians. Eudemus of Rhodes (Dubitationes et Solutiones de Primis Principiis, in Platonis Parmenidem) refers to "the Magi and all those of Iranian (áreion) lineage". Diodorus Siculus (1.94.2) considers Zoroaster (Zathraustēs) as one of the Arianoi.

Strabo, in his Geographica, mentions the unity of Medes, Persians, Bactrians and Sogdians:

The Bactrian (a Middle Iranian language) inscription of Kanishka (the founder of the Kushan Empire) at Rabatak, which was discovered in 1993 in an unexcavated site in the Afghan province of Baghlan, clearly refers to this Eastern Iranian language as Arya.

All this evidence shows that the name Arya was a collective definition, denoting peoples who were aware of belonging to the one ethnic stock, speaking a common language, and having a religious tradition that centered on the cult of Ohrmazd.

The academic usage of the term Iranian is distinct from the state of Iran and its various citizens (who are all Iranian by nationality), in the same way that the term Germanic peoples is distinct from Germans. Many inhabitants of Iran are not necessarily ethnic Iranians by virtue of not being speakers of Iranian languages.

Proto-Indo-Iranians
The Proto-Indo-Iranians are commonly identified with the Sintashta culture and the subsequent Andronovo culture within the broader Andronovo horizon, and their homeland with an area of the Eurasian steppe that borders the Ural River on the west, the Tian Shan on the east.

The Indo-Iranians interacted with the Bactria-Magiana Culture, also called "Bactria-Magiana Archaeological Complex". Proto-Indo-Iranian arose due to this influence. The Indo-Iranians also borrowed their distinctive religious beliefs and practices from this culture.

The Indo-Iranian migrations took place in two waves. The first wave consisted of the Indo-Aryan migration into the Levant, founding the Mittani kingdom, and a migration south-eastward of the Vedic people, over the Hindu Kush into northern India. The Indo-Aryans split-off around 1800-1600 BCE from the Iranians, where-after they were defeated and split into two groups by the Iranians, who dominated the Central Eurasian steppe zone and "chased [the Indo-Aryans] to the extremities of Central Eurasia." One group were the Indo-Aryans who founded the Mitanni kingdom in northern Syria; (c. 1500–1300 BCE) the other group were the Vedic people. Christopher I. Beckwith suggests that the Wusun, an Indo-European Caucasian people of Inner Asia in antiquity, were also of Indo-Aryan origin.

The second wave is interpreted as the Iranian wave, and took place in the third stage of the Indo-European migrations from 800 BCE onwards.

Sintashta-Petrovka culture


The Sintashta culture, also known as the Sintashta-Petrovka culture or Sintashta-Arkaim culture, is a Bronze Age archaeological culture of the northern Eurasian steppe on the borders of Eastern Europe and Central Asia, dated to the period 2100–1800 BCE. It is probably the archaeological manifestation of the Indo-Iranian language group.

The Sintashta culture emerged from the interaction of two antecedent cultures. Its immediate predecessor in the Ural-Tobol steppe was the Poltavka culture, an offshoot of the cattle-herding Yamnaya horizon that moved east into the region between 2800 and 2600 BCE. Several Sintashta towns were built over older Poltovka settlements or close to Poltovka cemeteries, and Poltovka motifs are common on Sintashta pottery. Sintashta material culture also shows the influence of the late Abashevo culture, a collection of Corded Ware settlements in the forest steppe zone north of the Sintashta region that were also predominantly pastoralist. Allentoft et al. (2015) also found close autosomal genetic relationship between peoples of Corded Ware culture and Sintashta culture.

The earliest known chariots have been found in Sintashta burials, and the culture is considered a strong candidate for the origin of the technology, which spread throughout the Old World and played an important role in ancient warfare. Sintashta settlements are also remarkable for the intensity of copper mining and bronze metallurgy carried out there, which is unusual for a steppe culture.

Because of the difficulty of identifying the remains of Sintashta sites beneath those of later settlements, the culture was only recently distinguished from the Andronovo culture. It is now recognised as a separate entity forming part of the 'Andronovo horizon'.

Andronovo culture


The Andronovo culture is a collection of similar local Bronze Age Indo-Iranian cultures that flourished c. 1800–900 BCE in western Siberia and the west Asiatic steppe. It is probably better termed an archaeological complex or archaeological horizon. The name derives from the village of Andronovo (55.88333°N, 55.7°W), where in 1914, several graves were discovered, with skeletons in crouched positions, buried with richly decorated pottery. The older Sintashta culture (2100–1800), formerly included within the Andronovo culture, is now considered separately, but regarded as its predecessor, and accepted as part of the wider Andronovo horizon. At least four sub-cultures of the Andronovo horizon have been distinguished, during which the culture expands towards the south and the east:
 * Sintashta-Petrovka-Arkaim (Southern Urals, northern Kazakhstan, 2200–1600 BCE)
 * the Sintashta fortification of ca. 1800 BCE in Chelyabinsk Oblast
 * the Petrovka settlement fortified settlement in Kazakhstan
 * the nearby Arkaim settlement dated to the 17th century
 * Alakul (2100–1400 BCE) between Oxus and Jaxartes, Kyzylkum desert
 * Alekseyevka (1300–1100 BCE "final Bronze") in eastern Kazakhstan, contacts with Namazga VI in Turkmenia
 * Ingala Valley in the south of the Tyumen Oblast
 * Fedorovo (1500–1300 BCE) in southern Siberia (earliest evidence of cremation and fire cult)
 * Beshkent-Vakhsh (1000–800 BCE)

The geographical extent of the culture is vast and difficult to delineate exactly. On its western fringes, it overlaps with the approximately contemporaneous, but distinct, Srubna culture in the Volga-Ural interfluvial. To the east, it reaches into the Minusinsk depression, with some sites as far west as the southern Ural Mountains, overlapping with the area of the earlier Afanasevo culture. Additional sites are scattered as far south as the Koppet Dag (Turkmenistan), the Pamir (Tajikistan) and the Tian Shan (Kyrgyzstan). The northern boundary vaguely corresponds to the beginning of the Taiga. In the Volga basin, interaction with the Srubna culture was the most intense and prolonged, and Federovo style pottery is found as far west as Volgograd.

Most researchers associate the Andronovo horizon with early Indo-Iranian languages, though it may have overlapped the early Uralic-speaking area at its northern fringe.

Scythians and Persians
From the late 2nd millennium BCE to early 1st millennium BCE the Iranians had expanded from the Eurasian Steppe, and Iranian peoples such as Medes, Persians, Bactrians, and Parthians populated the Iranian plateau.

Scythian tribes, along with Cimmerians, Sarmatians and Alans populated the steppes north of the Black Sea. The Scythian and Sarmatian tribes would quickly spread as far west as the Great Hungarian Plain, while mainly settling in Ukraine, Southern European Russia, and the Balkans,  while other Scythian tribes, such as the Saka, spread as far east as Xinjiang, China. Scythians as well formed the Indo-Scythian Empire, and Bactrians formed a Greco-Bactrian Kingdom founded by Diodotus I, the satrap of Bactria. The Kushan Empire, with Bactrian roots/connections, once controlled much of Pakistan, Afghanistan, and Tajikistan. The Kushan elite (who the Chinese called the Yuezhi) were either a Tocharian-speaking (another Indo-European branch) people or an Eastern Iranian language-speaking people.

Western and Eastern Iranians
The division into an "Eastern" and a "Western" group by the early 1st millennium is visible in Avestan vs. Old Persian, the two oldest known Iranian languages. The Old Avestan texts known as the Gathas are believed to have been composed by Zoroaster, the founder of Zoroastrianism, with the Yaz culture (c. 1500 BCE – 1100 BCE) as a candidate for the development of Eastern Iranian culture.

Western Iranian peoples


During the 1st centuries of the 1st millennium BCE, the ancient Persians established themselves in the western portion of the Iranian plateau and appear to have interacted considerably with the Elamites and Babylonians, while the Medes also entered in contact with the Assyrians. Remnants of the Median language and Old Persian show their common Proto-Iranian roots, emphasized in Strabo and Herodotus' description of their languages as very similar to the languages spoken by the Bactrians and Soghdians in the east. Following the establishment of the Achaemenid Empire, the Persian language (referred to as "Farsi" in Persian) spread from Pars or Fars Province to various regions of the Empire, with the modern dialects of Iran, Afghanistan (also known as Dari) and Central-Asia (known as Tajiki) descending from Old Persian.

At first, the Western Iranian peoples in the Near East were absolutely dominated by the various Assyrian empires. An alliance with the Medes, Persians, and rebelling Babylonians, Scythians, Chaldeans, and Cimmerians, helped the Medes to capture Nineveh in 612 BCE, which resulted in the eventual collapse of the Neo-Assyrian Empire by 605 BC. The Medes were subsequently able to establish their Median kingdom (with Ecbatana as their royal centre) beyond their original homeland and had eventually a territory stretching roughly from northeastern Iran to the Halys River in Anatolia. After the fall of the Assyrian Empire, between 616 BCE and 605 BCE, a unified Median state was formed, which, together with Babylonia, Lydia, and Egypt, became one of the four major powers of the ancient Near East

Later on, in 550 BC, Cyrus the Great, would overthrow the leading Median rule, and conquer Kingdom of Lydia and the Babylonian Empire after which he established the Achaemenid Empire (or the First Persian Empire), while his successors would dramatically extend its borders. At its greatest extent, the Achaemenid Empire would encompass swaths of territory across three continents, namely Europe, Africa and Asia, stretching from the Balkans and Eastern Europe proper in the west, to the Indus Valley in the east. The largest empire of ancient history, with their base in Persis (although the main capital was located in Babylon) the Achaemenids would rule much of the known ancient world for centuries. This First Persian Empire was equally notable for its successful model of a centralised, bureaucratic administration (through satraps under a king) and a government working to the profit of its subjects, for building infrastructure such as a postal system and road systems and the use of an official language across its territories and a large professional army and civil services (inspiring similar systems in later empires), and for emancipation of slaves including the Jewish exiles in Babylon, and is noted in Western history as the antagonist of the Greek city states during the Greco-Persian Wars. The Mausoleum at Halicarnassus, one of the Seven Wonders of the Ancient World, was built in the empire as well.

The Greco-Persian Wars resulted in the Persians being forced to withdraw from their European territories, setting the direct further course of history of Greece and the rest of Europe. More than a century later, a prince of Macedon (which itself was a subject to Persia from the late 6th century BC up to the First Persian invasion of Greece) later known by the name of Alexander the Great, overthrew the incumbent Persian king, by which the Achaemenid Empire was ended.

Old Persian is attested in the Behistun Inscription (c. 519 BCE), recording a proclamation by Darius the Great. In southwestern Iran, the Achaemenid kings usually wrote their inscriptions in trilingual form (Elamite, Babylonian and Old Persian) while elsewhere other languages were used. The administrative languages were Elamite in the early period, and later Imperial Aramaic, as well as Greek, making it a widely used bureaucratic language. Even though the Achaemenids had extensive contacts with the Greeks and vice versa, and had conquered many of the Greek-speaking area's both in Europe and Asia Minor during different periods of the empire, the native Old Iranian sources provide no indication of Greek linguistic evidence. However, there is plenty of evidence (in addition to the accounts of Herodotus) that Greeks, apart from being deployed and employed in the core regions of the empire, also evidently lived and worked in the heartland of the Achaemenid Empire, namely Iran. For example, Greeks were part of the various ethnicities that constructed Darius' palace in Susa, apart from the Greek inscriptions found nearby there, and one short Persepolis tablet written in Greek.

The early inhabitants of the Achaemenid Empire appear to have adopted the religion of Zoroastrianism. The Baloch who speak a west Iranian language relate an oral tradition regarding their migration from Aleppo, Syria around the year 1000 CE, whereas linguistic evidence links Balochi to Kurmanji, Soranî, Gorani and Zazaki language.

Eastern Iranian peoples


While the Iranian tribes of the south are better known through their texts and modern counterparts, the tribes which remained largely in the vast Eurasian expanse are known through the references made to them by the ancient Greeks, Persians, Chinese, and Indo-Aryans as well as by archaeological finds. The Greek chronicler, Herodotus (5th century BCE) makes references to a nomadic people, the Scythians; he describes them as having dwelt in what is today southern European Russia and Ukraine. He was the first to make a reference to them. Many ancient Sanskrit texts from a later period make references to such tribes they were witness of pointing them towards the southeastern-most edges of Central Asia, around the Hindukush range in northern Pakistan.

It is believed that these Scythians were conquered by their eastern cousins, the Sarmatians, who are mentioned by Strabo as the dominant tribe which controlled the southern Russian steppe in the 1st millennium CE. These Sarmatians were also known to the Romans, who conquered the western tribes in the Balkans and sent Sarmatian conscripts, as part of Roman legions, as far west as Roman Britain. These Iranian-speaking Scythians and Sarmatians dominated large parts of Eastern Europe for a millennium, and were eventually absorbed and assimilated (e.g. Slavicisation) by the Proto-Slavic population of the region.

The Sarmatians differed from the Scythians in their veneration of the god of fire rather than god of nature, and women's prominent role in warfare, which possibly served as the inspiration for the Amazons. At their greatest reported extent, around the 1st century AD, these tribes ranged from the Vistula River to the mouth of the Danube and eastward to the Volga, bordering the shores of the Black and Caspian Seas as well as the Caucasus to the south. Their territory, which was known as Sarmatia to Greco-Roman ethnographers, corresponded to the western part of greater Scythia (mostly modern Ukraine and Southern Russia, also to a smaller extent north eastern Balkans around Moldova). According to authors Arrowsmith, Fellowes and Graves Hansard in their book A Grammar of Ancient Geography published in 1832, Sarmatia had two parts, Sarmatia Europea and Sarmatia Asiatica covering a combined area of 503,000 sq mi or 1,302,764 km2.

Throughout the first millennium AD, the large presence of the Sarmatians who once dominated Ukraine, Southern European Russia, and swaths of the Balkans, gradually started to diminish mainly due to assimilation and absorption by the Germanic Goths, especially from the areas near the Roman frontier, but only completely and climactically by the (Proto-Slavic peoples. The abundant East Iranian-derived toponyms in Eastern Europe proper (e.g. some of the largest rivers; the Dniestr and Dniepr) and the Balkans, as well as loanwords adopted predominantly through the Eastern Slavic languages and adopted aspects of Iranian culture amongst the early Slavs, are all a remnant of this. A connection between Proto-Slavonic and Iranian languages is also furthermore proven by the earliest layer of loanwords in the former. For instance, the Proto-Slavonic words for god (*bogъ), demon (*divъ), house (*xata), axe (*toporъ) and dog (*sobaka) are of Scythian origin.

A further point on behalf of the extensive contact between these Scytho-Sarmatian Iranian tribes in Eastern Europe and the (Early) Slavs is to be shown in matters regarding religion. After Slavic and Baltic languages diverged –- also evidenced by etymology –- the Early Slavs interacted with Iranian peoples and merged elements of Iranian spirituality into their beliefs. For example, both Early Iranian and Slavic supreme gods were considered givers of wealth, unlike the supreme thunder gods in many other European religions. Also, both Slavs and Iranians had demons –- given names from similar linguistic roots, Daêva (Iranian) and Divŭ (Slavic) –- and a concept of dualism, of good and evil.

The Sarmatians of the east, based in the North Caucasus, became the Alans, who also ventured far and wide, with a branch ending up in Western Europe and North Africa, as they accompanied the Germanic Vandals during their migrations. The modern Ossetians are believed to be the sole direct descendants of the Alans, as other remnants of the Alans disappeared following Germanic, Hunnic and ultimately Slavic migrations and invasions. Another group of Alans allied with Goths to defeat the Romans and ultimately settled in what is now called Catalonia (Goth-Alania). Some of the Saka-Scythian tribes in Central Asia would later move further southeast and invade the Iranian plateau, large sections of present-day Afghanistan and finally deep into present day Pakistan (see Indo-Scythians). Another Iranian tribe related to the Saka-Scythians were the Parni in Central Asia, and who later become indistinguishable from the Parthians, speakers of a northwest-Iranian language. Many Iranian tribes, including the Khwarazmians, Massagetae and Sogdians, were assimilated and/or displaced in Central Asia by the migrations of Turkic tribes emanating out of Xinjiang and Siberia.

The most dominant surviving Eastern Iranian peoples are represented by the Pashtuns, whose origins are generally believed to be from the province of Ghor, from which they began to spread until they reached as far west as Herat, north to areas of southern and eastern Afghanistan; and as eastward towards the Indus. The Pashto language shows affinities to the Avestan and Bactrian.

The modern Sarikoli in southern Xinjiang and the Ossetians of the Caucasus (mainly South Ossetia and North Ossetia) are remnants of the various Scythian-derived tribes from the vast far and wide territory they once dwelled in. The modern Ossetians are the descendants of the Alano-Sarmatians, and their claims are supported by their Northeast Iranian language, while culturally the Ossetians resemble their North Caucasian neighbors, the Kabardians and Circassians. Various extinct Iranian peoples existed in the eastern Caucasus, including the Azaris, while some Iranian peoples remain in the region, including the Talysh and the Tats (including the Judeo-Tats, who have relocated to Israel), found in Azerbaijan and as far north as the Russian republic of Dagestan. A remnant of the Sogdians is found in the Yaghnobi-speaking population in parts of the Zeravshan valley in Tajikistan.

Later developments
Starting with the reign of Omar in 634 CE, Muslim Arabs began a conquest of the Iranian plateau. The Arabs conquered the Sassanid Empire of the Persians and seized much of the Byzantine Empire populated by the Kurds and others. Ultimately, the various Iranian peoples, including the Persians, Pashtuns, Kurds and Balochis, converted to Islam, while the Alans converted to Christianity, thus laying the foundation for the fact that the modern-day Ossetians are Christian. The Iranian peoples would later split along sectarian lines as the Persians (and later the Hazara) adopted the Shi'a sect. As ancient tribes and identities changed, so did the Iranian peoples, many of whom assimilated foreign cultures and peoples.

Later, during the 2nd millennium CE, the Iranian peoples would play a prominent role during the age of Islamic expansion and empire. Saladin, a noted adversary of the Crusaders, was an ethnic Kurd, while various empires centered in Iran (including the Safavids) re-established a modern dialect of Persian as the official language spoken throughout much of what is today Iran and the Caucasus. Iranian influence spread to the neighbouring Ottoman Empire, where Persian was often spoken at court (though a heavy Turko-Persian basis there was set already by the predecessors of the Ottomans in Anatolia, namely the Seljuks and the Sultanate of Rum amongst others) as well to the court of the Mughal Empire. All of the major Iranian peoples reasserted their use of Iranian languages following the decline of Arab rule, but would not begin to form modern national identities until the 19th and early 20th centuries (just as Germans and Italians were beginning to formulate national identities of their own).

Demographics
There are an estimated 150 to 200 million native speakers of Iranian languages, the five major groups of Persians, Lurs, Kurds, Baloch, and Pashtuns accounting for about 90% of this number. Currently, most of these Iranian peoples live in Iran, Afghanistan, the Caucasus (mainly Ossetia, other parts of Georgia, Dagestan, and Azerbaijan), Iraqi Kurdistan and Kurdish majority populated areas of Turkey, Iran and Syria, Tajikistan, Pakistan and Uzbekistan. There are also Iranian peoples living in Eastern Arabia such as northern Oman and Bahrain.

Due to recent migrations, there are also large communities of speakers of Iranian languages in Europe, the Americas, and Israel.

The following is a list of peoples that speak Iranian languages with the respective groups's core areas of settlements and their estimated sizes (in millions):

Culture


With numerous artistic, scientific, architectural and philosophical achievements and numerous kingdoms and empires that bridged much of the civilized world in antiquity, the Iranian peoples were often in close contact with the Greeks, Romans, Egyptians, Indians, Armenians, Caucasians, Chinese, Turks and Arabs. The various religions of the Iranian people, including Zoroastrianism, Mithraism and Manichaeism, are believed by some scholars to have been significant early philosophical influences on Christianity and Judaism.

Like other Indo-Europeans, the early Iranians practiced ritual sacrifice, had a social hierarchy consisting of warriors, clerics and farmers and poetic hymns and sagas to recount their deeds.



Following the Iranian split from the Indo-Iranians, the Iranians developed an increasingly distinct culture. Various common traits can be discerned among the Iranian peoples. For example, the social event Norouz is an Iranian festival that is practiced by nearly all of the Iranian peoples as well as others in the region. Its origins are traced to Zoroastrianism and pre-historic times.

Some Iranian cultures exhibit traits that are unique unto themselves. The Pashtuns adhere to a code of honor and culture known as Pashtunwali, which has a similar counterpart among the Baloch, called Mayar, that is more hierarchical.

Religion
The early Iranian peoples worshipped various deities of found throughout Proto-Indo-Iranian religion where Indo-European immigrants established themselves. The earliest major religion of the Iranian peoples was Zoroastrianism, which spread to nearly all of the Iranian peoples living in the Iranian plateau. Other religions that had their origins in the Iranian world were Mithraism, Manichaeism, and Mazdakism, among others. Modern speakers of Iranian languages mainly follow Islam. Some follow Judaism, Christianity, Zoroastrianism, and the Bahá'í Faith, with an unknown number showing no religious affiliation. Overall the numbers of Sunni and Shia among the Iranian peoples are equally distributed. Most Kurds, Tajiks, Pashtuns, and Baloch are Sunni Muslims, while the remainder are mainly Twelver Shi'a, comprising mostly Persians in Iran, and Hazaras in Afghanistan. Zazas in Turkey are largely Alevi, while the Pamiri peoples in Tajikistan and China are nearly all Ismaili. The Christian community is mainly represented by the Armenian Apostolic Church, followed by the Russian Orthodox and Georgian Orthodox Ossetians followed by Nestorians. Judaism is followed mainly by Persian Jews, Kurdish Jews, Bukharian Jews (of Central Asia) and the Mountain Jews (of the Caucasus), most of whom are now found in Israel. The historical religion of the Persian Empire was Zoroastrianism and it still has a few thousand followers, mostly in Yazd and Kerman. They are known as the Parsis in the Indian subcontinent, where many of them fled in historic times following the Arab conquest of Persia, or Zoroastrians in Iran. Another ancient religion is the Yezidi faith of the ethno-religious group of the Yazidi people, followed by Yazidi people in northern Iraq, Syria, Turkey and in Armenia.

Elements of pre-Islamic Zoroastrian and Paganistic beliefs persist among some Islamized groups today, such as the Tajiks, Pashtuns, Pamiri peoples and Ossetians.

Cultural assimilation
In matters relating to culture, the various Turkic-speaking ethnic groups of Iran (notably the Azerbaijani people) and Afghanistan (Uzbeks and Turkmen) are often conversant in Iranian languages, in addition to their own Turkic languages and also have Iranian culture to the extent that the term Turko-Iranian can be applied. The usage applies to various circumstances that involve historic interaction, intermarriage, cultural assimilation, bilingualism and cultural overlap or commonalities.

Notable among this synthesis of Turko-Iranian culture are the Azeris, whose culture, religion and significant periods of history are linked to the Persians. Certain theories and genetic tests suggest that the Azeris are genetically more Iranian than Turkic.

The following either partially descend from Iranian peoples or are sometimes regarded as possible descendants of ancient Iranian peoples:
 * Turkic-speakers:
 * Azeris: Although Azeris speak a Turkic language (modern Azerbaijani language), they are believed to be primarily descendants of ancient Iranians.  Thus, due to their historical ties with various ancient Iranians, as well as their cultural ties to Persians, the Azeris are often associated with the Iranian peoples (see Origin of Azerbaijani people and the Iranian theory regarding the origin of the Azerbaijanis for more details).
 * Turkmens: The Turkmen people are believed to be a mix of Iranian and Turkic ancestry. Genetic studies on mitochondrial DNA (mtDNA) restriction polymorphism confirmed that Turkmen were characterized by the presence of local Iranian mtDNA lineages, similar to the Eastern Iranian populations, but high male Mongoloid genetic component observed in Turkmens and Hazara in east Iran and Afghanistan with the frequencies of about 20%. This most likely indicates an ancestral combination of Iranian groups and Mongol that the modern Turkmen have inherited and which appears to correspond to the historical record which indicates that various Iranian tribes existed in the region prior to the migration of Turkic tribes who are believed to have merged with the local population and imparted their language and created something of a hybrid Turko-Iranian culture.
 * Uzbeks: The modern Uzbek people are believed to have both Iranian and Turkic ancestry. "Uzbek" and "Tajik" are modern designations given to the culturally homogeneous, sedentary population of Central Asia. The local ancestors of both groups – the Turkic-speaking Uzbeks and the Iranian-speaking Tajiks – were known as "Sarts" ("sedentary merchants") prior to the Russian conquest of Central Asia, while "Uzbek" or "Turk" were the names given to the nomadic and semi-nomadic populations of the area. Still today, modern Uzbeks and Tajiks are known as "Sarts" to their Turkic neighbours, the Kazakhs and the Kyrgyz. The ancient Soghdians and Bactrians are among their ancestors. Culturally, the Uzbeks are closer to their sedentary Iranian-speaking neighbours rather than to their nomadic and semi-nomadic Turkic neighbours. Some Uzbek scholars, i.e. Ahmadov and Askarov, favour the Iranian origin theory.
 * Uyghurs: Some Uyghurs are descendants of the Saka people in Buddhist Kingdom of Khotan.
 * Slavic-speakers:
 * Linguists suggest that the names of the South Slavic peoples, the Serbs and Croats, are of Iranian origin. Those who entertain such a connection propose that the Sarmatian Serboi and alleged Horoathos tribes might have migrated from the Eurasian steppe lands to Eastern and Central Europe, and assimilated with the numerically superior Slavs, passing on their name. Iranian-speaking peoples did inhabit parts of the Balkans in late classical times, and would have been encountered by the Slavs. However, direct linguistic, historical or archaeological proof for such a theory is lacking. (See also: Origin hypotheses of the Serbs and Origin hypotheses of the Croats)
 * Indo-Aryan speakers
 * Speakers of Indo-Aryan languages share linguistic affinities with speakers of Iranian languages, which suggests a degree of historical interaction between these two groups.
 * Swahili-speakers:
 * Shirazis: The Shirazi are a sub-group of the Swahili people living on the Swahili Coast of East Africa, especially on the islands of Zanzibar, Pemba and Comoros. Local traditions about their origin claim they are descended from merchant princes from Shiraz in Persia who settled along the Swahili Coast.

Genetics
Regueiro et al (2006) and Grugni et al (2012) have performed large-scale sampling of different ethnic groups within Iran. They found that the most common Haplogroups were:


 * J1-M267; typical of Semitic peoples, was rarely over 10% in Iranian groups, but as high as 30% in Assyrian minorities of Iran.
 * J2-M172: is the most common Hg in Iran (~23%); almost exclusively represented by J2a-M410 subclade (93%), the other major sub-clade being J2b-M12. Apart from Iranians, J2 is common in Mediterranean and Balkan peoples (Croatians, Serbs, Greeks, Bosnians, Albanians, Italians, Bulgarians, Turks), in the Caucasus (Armenians, Georgia, northeastern Turkey, north/northwestern Iran, Kurds, Persians); whilst its frequency drops suddenly beyond Afghanistan, Pakistan and northern India. In Europe, J2a is more common in the southern Greece and southern Italy; whilst J2b (J2-M12) is more common in Thessaly, Macedonia and central – northern Italy. Thus J2a and its subgroups within it have a wide distribution from Italy to India, whilst J2b is mostly confined to the Balkans and Italy, being rare even in Turkey. Whilst closely linked with Anatolia and the Levant; and putative agricultural expansions, the distribution of the various sub-clades of J2 likely represents a number of migrational histories which require further elucidation.
 * R1a-M198: is common in Iran, more so in the east and south rather than the west and north; suggesting a migration toward the south to India then a secondary westward spread across Iran. Whilst the Grongi and Regueiro studies did not define exactly which sub-clades Iranian R1a haplogrouops belong to, private genealogy tests suggest that they virtually all belong to "Eurasian" R1a-Z93. Indeed, population studies of neighbouring Indian groups found that they all were in R1a-Z93. This implies that R1a in Iran did not descend from "European" R1a, or vice versa. Rather, both groups are collateral, sister branches which descend from a parental group hypothesized to have initially lived somewhere between central Asia and Eastern Europe.
 * R1b – M269: is widespread from Ireland to Iran, and is common in highland West Asian populations such as Armenians, Turks and Iranians – with an average frequency of 8.5%. Iranian R1b belongs to the L-23 subclade, which is an older than the derivative subclade (R1b-M412) which is most common in western Europe.
 * Haplogroup G and subclades: most concentrated in the southern Caucasus, it is present in 10% of Iranians.
 * Haplogroup E and various subclades are markers of various northern and eastern African populations. They are present in less than 10% of Iranians (see Afro-Iranians).

Two large – scale papers by Haber (2012) and Di Cristofaro (2013) analyzed populations from Afghanistan, where several Iranian-speaking groups are native. They found that different groups (e.g. Baluch, Hazara, Pashtun) were quite diverse, yet overall:
 * R1a (subclade not further analyzed) was the predominant haplogroup, especially amongst Pashtuns, Balochi and Tajiks.
 * The presence of "east Eurasian" haplogroup C3, especially in Hazaras (33-40%), in part linked to Mongol expansions into the region.
 * The presence of haplogroup J2, like in Iran, of 5–20%.
 * A relative paucity of "Indian" haplgroup H (< 10%).

Internal diversity and distant affinities
Overall, Iranian-speaking populations are characterized by high internal diversity. For Afghanistan, "It is possibly due to the strategic location of this region and its unique harsh geography of mountains, deserts and steppes, which could have facilitated the establishment of social organizations within expanding populations, and helped maintaining genetic boundaries among groups that have developed over time into distinct ethnicities" as well as the "high level of endogamy practiced by these groups". The data ultimately suggests that Afghanistan, like other northern-central Asian regions, has continually been the recipient rather than a source of gene flow. Although, populations from Iran proper are also diverse, J2a-M530 likely spread out of Iran, and constitutes a common genetic substratum for all Iranian populations, which was then modified by further differential gene flows. In Iran, language was a greater determinant of genetic similarity between different groups, whereas in Afghanistan and other areas of northern central Asia, this was not the case.

Overall in Iran, native population groups do not form tight clusters either according to language or region. Rather, they occupy intermediate positions among Near Eastern and Caucasus clusters. Some of the Iranian groups lie within the Near Eastern group (often with such as the Turks and Georgians), but none fell into the Arab or Asian groups. Some Iranian groups in Iran, such as the Gilaki's and Mazandarani's, have paternal genetics (Y-DNA) virtually identical to South Caucasus ethnic groups, while the small Iranian Baloch ethnic group, being the only outliers who have heavy pulls towards South Asia.

In Afghanistan, Iranian population groups such as the Pashtuns and Tajiks occupy intermediate positions amongst northwestern South Asian ethnic groups, such as along the Baloch, Brahui, Kashmiri's and Sindhi's, with a small minor pull towards West Asia.

Iranians are only distantly related to Europeans as a whole, predominantly with southern Europeans like Greeks, Albanians, Serbs, Croatians, Italians, Bosniks, Spaniards, Macedonians, Portuguese, and Bulgarians, rather than northern Europeans like Norwegians, Danes, Swedes, Irish, Scottish, English, Finns, Estonians, Welsh, Latvians, and Lithuanians. Nevertheless, Iranian-speaking Central Asians do show closer affinity to Europeans than do Turkic-speaking Central Asians.