Charuvakan is called Atheist in common parlance.
Pramanam - only Pratyaksham
Consciousness (Self Awareness) - Chaitanyam is born when the (4 or) 5 stoola bhootas - (Akasham,) Vayu, Agni, Aapa:, and Prithvi interact together.
Example: There is no red color inherent in the Betel Leaf. However, it causes red color on the tongue when chewed.
Svarga/Naraka: The experiences - favorable and unfavorable, enjoyed/suffered by the "chaitanyam" is the Svarga/Naraka.
Death: When the 5 Stoola Bhootas disintegrate (separate), the chaitanyam is destroyed. This is death/moksha. There is nothing beyond this (i.e no after life etc.)
