And we're seeing the results of this mindset now. Problem is that it's about as far from the Sermon on the Mount as you can get, to say nothing of the moral code in the Old Testament. It's individualism allowed to run rampant at the cost of society. Nietzsche's superman will win and the rest of us will be toast.
If that's the world you want, you are in serious danger of getting it. Just remember, you might not be the superman you think you are. what then? To whom will you turn?