Vedic Period Begins in India
Around 1500 BCE, according to the conventional chronology, the Vedic period began in the northwest of the Indian subcontinent. It is associated with the arrival and spread of Indo-Aryan-speaking groups, the composition of the Vedas in an early form of Sanskrit, and the formation of religious and social ideas that shaped later Hinduism and much of South Asian culture. The date is approximate, and both the starting point and the nature of the transition remain debated.
The background lies in the decline of the Indus Valley (Harappan) civilization, whose cities were in decline from roughly 1900 BCE onward. Its script remains undeciphered, so its languages and beliefs are poorly known. Linguists have long observed that Sanskrit is closely related to Iranian languages and, more distantly, to Greek, Latin and most European tongues. This points to a shared Indo-European ancestry and to movement of speakers from Central Asia and the steppe region. Many scholars see a gradual migration of pastoral groups into the northwest over several centuries, rather than a sudden invasion. The older idea of a violent conquest that destroyed Harappan cities is now largely rejected.
The main source for the early period is the Rigveda, a collection of more than a thousand hymns composed orally and passed down by memorization with remarkable precision. Its dating rests mostly on linguistic evidence, and it was written down only much later. The hymns honor deities such as Indra, Agni and Varuna, and describe a society of cattle-herding clans led by chiefs, with priests performing fire sacrifices. Three further Vedas, the Samaveda, Yajurveda and Atharvaveda, followed, along with prose commentaries and later the Upanishads. The geography described shifts from the Punjab and the Indus region toward the Ganges plain in later centuries.
Over time, Vedic society changed. Small tribal groups gave way to larger kingdoms, iron tools came into use around 1000 BCE, and agriculture expanded in the Gangetic plain. The fourfold division of society into priests, warriors, commoners and servants (varna) appears in later texts and became a foundation of the caste system, though how rigid it was in this early period is uncertain. Ritual grew more elaborate, and eventually philosophical inquiry in the Upanishads turned toward ideas such as karma, rebirth and liberation.
The legacy is substantial. Sanskrit became the classical language of scholarship and religion, and the Vedas remain sacred texts for Hindus, still recited in ritual today. The Vedic period also set the cultural background from which Buddhism and Jainism emerged around the sixth century BCE. The question of Indo-Aryan origins, now informed by archaeology and ancient DNA studies, continues to be an active and sometimes politically charged field of research.