Comment by integralid
1 day ago
>What do you think it optimizes other than individual fitness?
Chance to pass genes forward. This is only equivalent to individual fitness for very solitary species and humans aren't.
As an extreme example, take soldier termites - their chance to pass their genes is zero, but the chance for the colony to survive grows. Also gay people exist (they also - usually - don't reproduce, but help others instead).
Humans naturally care about their family and tribe because this increases the chance of their bloodline to survive.
That's a distinction without a difference. Worker ants have high individual fitness if their colony successfully reproduces because they pass their genes forward.
In evolutionary theory this is made clear by using the term "inclusive fitness" - worker ants actually pass their genes on to future generations more effectively by taking the detour, if you will, through the queen.
If you want to be nitpicky and argue we should consider the individual gene the unit of selection, as Dawkins famously argued, I'm not going to disagree, you can see it that way too.
That specific distinction very rarely leads to different predictions though.