[sgdpk]

The Selfish Gene is great. The portions on Evolutionary Stable Strategies are particularly interesting. It shows how Darwinism can lead to a "steady state", where a population contains individuals with competing characteristics (selflessness VS selfishness), and why this not at odds with selection.

[benzin]

The jaw-dropping moment for this point is the section about bees, even if the author himself said it was very hard to understand. It reframed my understanding of a 'queen' bee at least.

[mongol]

Yes it is certainly a classic, I think it belongs to a category of books that really changes how society at large reasons about things. There are not that many books of that kind.