For the Evolutionary Ethics to be acceptable for valid theory, it must answer two essential
questions:

1) how does man distinguish between good and evil, and

2) why should man be good?

The proposals from evolutionary ethicists fall into 4 groups:

1. Human Evolution: natural selection of
human behavior.

2. Social Evolution: evolution of society and its values.

3. Sociobiology: evolution of the biological basis for ethics and social behavior

4. Meme Theory: evolution of culture.

Adapted from Evolutionary Ethics by Doris Schroeder Internet Encyclopedia of Philosophy