We don't descend from winners, we descend from whoever survived and it's not an individual competition.
If the only place a particularly beneficial mutation appears is wiped out by chance volcanic eruption, that's just how it is - the survivors who weren't near the volcano go on to reproduce.
If the only place a particularly beneficial mutation appears is wiped out by chance volcanic eruption, that's just how it is - the survivors who weren't near the volcano go on to reproduce.