It's worth pointing out that The Selfish Gene is kind of old, and is by no means the last word on evolutionary biology. https://en.wikipedia.org/wiki/Group_sel

It's worth pointing out that The Selfish Gene is kind of old, and is by no means the last word on evolutionary biology. https://en.wikipedia.org/wiki/Group_selection#Group_selection_revisited https://en.wikipedia.org/wiki/Group_selection#Group_selectio... >Since the 1990s, group selection models have seen a resurgence.