How many kinds of people are there?

Two: divine and demoniac

Vigor, forgiveness, fortitude, purity, absence of envy and pride—these are his who is born with the divine properties.

Hypocrisy, arrogance and conceit, wrath and also harshness and unwisdom are his who is born ... with demoniacal properties. 16:3-4

Three: pure, passionate, and dark.

Threefold is by nature the inborn faith of the embodied—pure, passionate, and dark ... The man consists of his faith; that which his faith is, he is even that. 17:2-3

Four: Brâhmanas (the priestly caste), Kshattriyas (the warrior caste), Vaishyas (merchant and farmer caste) and Shûdras (servant caste).

Brâhmanas, Kshattriyas, Vaishyas and Shûdras, O Parantapa, the duties have been distributed, according to the qualities born of their own natures. 18:41