Comhroinn Fuaime

"Religion also underwent a massive change. Older gods like Indra faded in importance, making way for Prajapati the Creator, Vishnu the Preserver, and Rudra-Shiva the Destroyer. Rituals became more complex and expensive. However, toward the end of this period, the Upanishads emerged, shifting the focus toward deep philosophy, the soul, and the concept of Moksha."