Mahajanapadas

In the later Vedic Age, a number of small kingdoms or city states had covered the subcontinent, many mentioned in Vedic, early Buddhist and Jaina literature as far back as 1000 BCE. By 500 BCE, sixteen monarchies and "republics" known as the Mahajanapadas — Kasi, Kosala, Anga, Magadha, Vajji (or Vriji), Malla, Chedi, Vatsa (or Vamsa), Kuru, Panchala, Matsya (or Machcha), Surasena, Assaka, Avanti, Gandhara, and Kamboja — stretched across the Indo-Gangetic Plain from modern-day Afghanistan to Bengal and Maharastra. This period saw the second major rise of urbanism in India after the Indus Valley Civilization.

Many smaller clans mentioned within early literature seem to have been present across the rest of the subcontinent. Some of these kings were hereditary; other states elected their rulers. The educated speech at that time was Sanskrit, while the languages of the general population of northern India are referred to as Prakrits. Many of the sixteen kingdoms had coalesced to four major ones by 500/400 BCE, by the time of Gautama Buddha. These four were Vatsa, Avanti, Kosala, and Magadha.

The Brahmanical tradition was paralleled by the non-Vedic Shramana movement. The Buddha was a member of this movement. Shramana also gave rise to Jainism, yoga, the concept of the cycle of birth and death, the concept of samsara, and the concept of liberation. The Brahmanical ashrama system of life was an attempt to institutionalize Shramana ideals within the Brahmanical social structure. The Shramana movement also influenced the Aranyakas and Upanishads in the Brahmanical tradition.

The Buddha found a Middle Way that ameliorated the extreme asceticism found in the Sramana religions. Around the same time, Mahavira (the 24th Tirthankara in Jainism) propagated a theology that was to later become Jainism. However, Jain orthodoxy believes the teachings of the Tirthankaras predates all known time and scholars believe Parshva, accorded status as the 23rd Tirthankara, was a historical figure. The Vedas are believed to have documented a few Tirthankaras and an ascetic order similar to the shramana movement.

The Buddha's teachings and Jainism had doctrines inclined toward asceticism, and they were preached in Prakrit, which helped them gain acceptance amongst the masses. They have profoundly influenced practices that Hinduism and Indian spiritual orders are associated with, including vegetarianism, prohibition of animal slaughter and ahimsa (non-violence). While the geographic impact of Jainism was limited to India, Buddhist nuns and monks eventually spread the teachings of Buddha to Central Asia, East Asia, Tibet, Sri Lanka and Southeast Asia.