Its survival is a matter of absolute certainty, because of its survival-value.
He may have been a throw-back to ancestors who had known bravery, which had no survival-value here.
If mankind lost this capacity, all its other characters of survival-value, such as intelligence, would obviously avail it nought.
The survival-value of individuation is greater than the survival-value of rapid multiplication.
She welcomes the parasitic tapeworm, all hooks and mouth or stomach, because these give it survival-value; and so on.
It does not matter that the good thing, in virtue of survival-value then superior, has been evolved.
A chief fact of progress has been, in a word, the supersession of the quantitative by the qualitative criterion of survival-value.