“Survival of the fittest” is an oversimplification because it leads to the distorted view that genes that confer a survival advantage in their host organism are those that will win the genetic race. But living a long life, however happy and productive, does not pass on genes. An organism needs to reproduce to pass on its genes. The name of the evolutionary game is to reproduce at all costs, and to see that one’s offspring live to do the same, and for their offspring to live long enough to do the same, and so on.
