Maybe jerks get further ahead in life than "nice guys". Maybe they are in wealthier, more powerful and have more sex. And maybe they find person after person they can use to get ahead. But they constantly need to steer themselves and others. They can't have loving, caring and trusting relationships with people. They can't trust to be liked no matter what. In the same way they use people to get ahead, they themselves get left behind the moment they don't perform. This puts an immense pressure on them, and to put it in the words of the article, they are at war their whole life. I'd totally trade money and status for not fighting my whole life.