basis of classical Hinduism and are known as Vedanta (conclusion of the Veda). The older Upanishads launched attacks of increasing intensity on the rituals, however, a philosophical and allegorical meaning is also given to these rituals. In some later Upanishads there is a spirit of accommodation towards rituals. The tendency which appears in the philosophical hymns of the Vedas to reduce the number of gods to one principle becomes prominent in the Upanishads. The diverse monistic speculations of the Upanishads were synthesised into a theistic framework by the sacred Hindu scripture Bhagavad Gita. Brahmanism Brahmanism, also called Brahminism, developed out of the Vedic religion, incorporating non-Vedic religious ideas, and expanding to a region stretching from the northwest Indian subcontinent to the Ganges valley. Brahmanism included the Vedic corpus, but also post-Vedic texts such as the Dharmasutras and Dharmasastras, which gave prominence to the priestly (Brahmin) class of the society. The emphasis on ritual and the dominant position of Brahmans developed as an ideology developed in the Kuru-Pancala realm, and expanded into a wider realm after the demise of the Kuru-Pancala realm. It co-existed with local religions, such as the Yaksha cults. In Iron Age India, during a period roughly spanning the 10th to 6th centuries BCE, the Mahajanapadas arise from the earlier kingdoms of the various Indo-Aryan tribes, and the remnants of the Late Harappan culture. In this period the mantra portions of the Vedas are largely completed, and a flowering industry of Vedic priesthood organised in numerous schools (shakha) develops exegetical literature, viz. the Brahmanas. These schools also edited the Vedic mantra portions into fixed recensions, that were to be preserved purely by oral tradition over the following two millennia. Second Urbanisation and decline of Brahmanism (c. 600–200 BCE) Upanishads and Śramaṇa movements Vedism, with its orthodox rituals, may have been challenged as a consequence of the increasing urbanisation of India in the 7th and 6th centuries BCE, and the influx of foreign stimuli initiated with the Achaemenid conquest of the Indus Valley (circa 535 BCE). New ascetic or sramana movements arose, which challenged established religious orthodoxy, such as Buddhism, Jainism and local popular cults. The anthropomorphic depiction of various deities apparently resumed in the middle of the 1st millennium BCE, also as the consequence of the reduced authority of Vedism. Mahavira (c. 549–477 BCE), proponent of Jainism, and Buddha (c. 563-483 BCE), founder of Buddhism, were the most