I don't agree. An animal that doesn't care about the survival of others of its species is at an evolutionary disadvantage and is selected against. Caring for others is seen in many different species, particularily in the most intelligent ones. Our capatalistic society to me looks like it pushes people towards focusing on individual gain just as much as helping others.
I'm just spitballing here, but maybe - since many (most?) humans aren't all that concerned about the safety of our species (at least in our day-to-day lives) - people are more concerned about passing on their own genes, rather than the simple survival of human genes?An animal that doesn't care about the survival of others of its species is at an evolutionary disadvantage and is selected against.