The following passage from the “Dighanikaya” exemplifies the neglected thought of the entirely materialist Carvaka Philosophy:
“Man is formed of the four elements.
When he dies, earth returns to the aggregate of earth, water to water, fire to fire, and air to air, while his senses vanish into space.
Four men with the bier take up the corpse: they gossip as far as the burning-ground, where his bones turn the color of a dove’s wing and his sacrifices end in ashes.
They are fools who preach alms-giving, and those who maintain the existence of immaterial categories speak vain and lying nonsense.
When the body dies, both fool and wise alike are cut off and perish.
They do not survive after death.”
Carvaka is certainly an Indian (and thus Hindu) philosophy, but it CANNOT be considered as one of the paths of Sanatana Dharma!