https://en.wikipedia.org/wiki/Charvaka
https://www.quora.com/search?q=Carvaka
http://www.carvaka4india.com/
The asuras were Misusing Spiritual theist Knowledge to Create disturbance in the world , so Guru Disguises as Shukra and preached them Material Atheist Knowledge Called Cārvāka Philosophy - becoming the first instance in history of non-religious and non-theistic materialism,
http://www.humanistictexts.org/carvaka.htm
http://www.iep.utm.edu/indmat/
https://www.quora.com/search?q=Carvaka
http://www.carvaka4india.com/
The asuras were Misusing Spiritual theist Knowledge to Create disturbance in the world , so Guru Disguises as Shukra and preached them Material Atheist Knowledge Called Cārvāka Philosophy - becoming the first instance in history of non-religious and non-theistic materialism,
http://www.humanistictexts.org/carvaka.htm
http://www.iep.utm.edu/indmat/