IMO, "survival is fitness" is a much better phrase.
The original form "survival of the fittest" is basically a tautology, but it's rarely taken a such. Even better people don't think of survival as a guarantee, at the individual level it’s fairly random, but people can easily see that some things help or hurt those odds.
The original form "survival of the fittest" is basically a tautology, but it's rarely taken a such. Even better people don't think of survival as a guarantee, at the individual level it’s fairly random, but people can easily see that some things help or hurt those odds.