It was never survival of the fittest- it is survival of the most adapted to a situation. If the situation rewards kindness- survival of the kindest- if the situation rewards being a heartless, survival of the heartless. If the situation is constantly fluctuating, survival of the system swinging between the both, by adapting to environmental clues.
Can we please let go of 1930 evolution papers wording and thinking and move on?
It's one of the meanings, and presumably the one that was in mind when the term was coined.
But an awful lot of people seem to take it to mean the other sense - "in good health, especially because of regular physical exercise", and extrapolate that out to mean that it's always the strongest/fastest etc that survive.
