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The Indo-Aryan migration theory explains the introduction of the Indo-Aryan languages in the Indian subcontinent by proposing a migration from the Sintashta culture〔.〕〔.〕 through Bactria-Margiana Culture and into northern Indian subcontinent (modern day India, Pakistan and Nepal). These migrations started approximately 1,800 BCE, after the invention of the war chariot, and also brought Indo-Aryan languages into the Levant and possibly Inner Asia. It was part of the diffusion of Indo-European languages from the proto-Indo-European homeland at the Pontic steppe, a large area of grasslands in far Eastern Europe, which started in the 5th to 4th millennia BCE, and the Indo-European migrations out of the Eurasian steppes, which started approximately 2,000 BCE. The theory posits that these Indo-Aryan speaking people may have been a genetically diverse group of people who were united by shared cultural norms and language, referred to as ''aryā'', "noble." Diffusion of this culture and language took place by patron-client systems, which allowed for the absorption and acculturalisation of other groups into this culture, and explains the strong influence on other cultures with which it interacted. The idea of an Indo-Aryan immigration was developed shortly after the discovery of the Indo-European language family in the late 18th century, when similarities between western and Indian languages had been noted. Given these similarities, a single source or origin was proposed, which was diffused by migrations from some original homeland. This linguistic argument is complemented with genetic, archaeological, literary, and cultural evidence, and research and discussions on it continue. The Proto-Indo-Iranians, from which the Indo-Aryans developed, are identified with the Sintashta culture (2100–1800 BCE), and the Andronovo culture, which flourished ca. 1800–1400 BCE in the steppes around the Aral sea, present-day Kazakhstan, Uzbekistan and Turkmenistan. The proto-Indo-Iranians were influenced by the Bactria-Margiana Culture, south of the Andronovo culture, from which they borrowed their distinctive religious beliefs and practices. The Indo-Aryans split off around 1800-1600 BCE from the Iranians, whereafter the Indo-Aryans migrated into the Levant and north-western India. The debate about the origin of Indo-Aryan peoples is controversial, resulting in political agitation and inflamed sentiments. Some have rejected the theory of Indo-Aryan origins outside of India, maintaining that the Indo-Aryan people and languages originated in India. ==Description of the Indo-Aryan Migration theory== The Indo-Aryan Migration theory is part of a larger theoretical framework. This framework explains the similarities between a wide range of contemporary and ancient languages. It combines linguistic, archaeological and anthropological research. This provides an overview of the development of indo-European languages, and the spread of these Indo-European languages by migration and acculturation. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Indo-Aryan migration theory」の詳細全文を読む スポンサード リンク
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