TS PSC Group 1 Services Prelims 2021 Paper

The Philosophy was purportedly founded in the 5^th Century BC by Makkali Gosala. It was a major rival of the Vedic religion. It reached the height of its popularity during the rule of the Mauryan Emperor Bindusra around 4^th Century BC. This School of thought was followed for nearly 2000 years through the 14^th century CE in the southern states of Karnataka and Tamilnadu?
Which school of thought is described above?