Different people value different things, and they will always look to uphold those values over others's. This shapes how people act, and also how they think. People who value something will find ways to justify striving for it even if it means going against other people's values.

In today's highly competitive world, people are turning more and more to selfishness to get ahead. An act of selfishness oftentimes gets you ahead, but an act of selflessness oftentimes gets several people ahead. The more selfless people become, the more everyone gets ahead.