The 6th century BCE witnessed an intellectual revolt against orthodox Later Vedic Brahminism driven by five major factors:
- Expensive Ritualism & Sacrifices: Complex animal sacrifices (*Yajnas*) demanded heavy sacrificial fees (*Dakshina*) to priests, draining common householders.
- Destruction of Cattle Wealth: The emerging agrarian economy of the Gangetic plain required bullocks for deep iron-ploughing. Sacrificing cattle depleted agricultural draught power.
- Rigid Caste Discrimination: The hereditary *Varna* hierarchy subjected Shudras and Vaishyas to social degradation, denying them Vedic education.
- Rise of the Merchant Class (Vaishyas): Expanding iron trade and coinage (*Punch-marked coins*) made traders wealthy, yet Brahmins treated them as inferior. Merchants eagerly supported new religions that rejected caste.
- Language Barrier: Vedic scriptures were composed in archaic Sanskrit, inaccessible to the common populace. Mahavira and Buddha preached in the popular vernaculars: Prakrit (Ardhamagadhi) and Pali.