Because most microbes reproduce asexually, close genetic relatives will surround cells as the population grows.

Here is where we find our closest genetic relatives that exhibit familiar behaviors, including cultural practices, tool use and language acquisition.

Therefore, kin selection serves an important purpose in the adapted brain because it favors actions that support genetic relatives.

To further minimize the risk, no one from that family of genetic relatives is permitted in here at all.

As a result, local clusters of genetic relatives tend to build up.

Second, an animal might direct altruistic acts towards genetic relatives of those with which it was raised.

A third possibility is that an animal might be able to recognise its own genetic relatives.

However, both protozoa and protists are paraphyletic groups (not including all genetic relatives of the group).

Also, the notion that humans will discriminate social behaviors towards genetic relatives is again not entailed by the theory.