Harmony or Competition?

What are some of the things that try to prevent of us from living in harmony with life? Some people aren't happy unless they feel they're better than others at what they do, and are miserable if someone else's life or work appears better than their own. This craving to be "top dog" leaves them in a very poor inner state rather than with the ability to appreciate the wonderful variety in people's lives and work. The one that struggles to be THE best rather than the INDIVIDUAL'S best leaves it very diffficult for that one to enjoy life.