Evolution changed Gazelles to run faster than the lions as a herd. However, for any gazelle to survive a lion, it has to run faster than the other gazelles too. Strongest survive, weakest die out.
How close people are to that?
There are some people who put their feet on each other shoulders to succeed, those who usually miss the most of the ride in trying to get there. And there are others who care about their surroundings, their herd, those who reach out and let others help them too. these guys maybe build a bit more memories than the first group.
The irony is that even a second type person, has to kill a first type once a while.