I don’t believe this is true. You are a draw from the pool of genes of your ancestors - with mutations. Assuming a specific mutation didn’t give you an evolut

I don’t believe this is true. You are a draw from the pool of genes of your ancestors - with mutations. Assuming a specific mutation didn’t give you an evolutionary advantage that you’d feel compelled to pass on, sometimes the optimum play is to optimize for the _pool of genes_ you came from and not your specific draw. There is an counter-intuitive evolutionary advantage to altruistic behavior, in which an organism can most efficiently propagate its own genes by increasing the probability of the overall species/sub-species survival - even if that means self-sacrifice.