Your making an assumption that this is a selected-for trait. I could just as easily substitute many hereditary disorders. As to why they are successful: cooper

Your making an assumption that this is a selected-for trait. I could just as easily substitute many hereditary disorders. As to why they are successful: cooperation is a more successful strategy than individualism, but cheating is a more successful strategy than cooperation if you can get away with it. Our societies have been largely shaped by cheaters for their benefit so they get away with it a lot, right up until the guillotine comes out.