What defines someone as 'unselfish?' In my experience, many 'unselfish' people are people that don't take the time to study and understand human nature. Since

What defines someone as 'unselfish?' In my experience, many 'unselfish' people are people that don't take the time to study and understand human nature. Since it's human nature to be 'nice' they default to this behavior and never seem to get the results they are after. Hence the depression. On the other hand, once you study, you'll learn that principled selfishness is the KEY to getting what you want. Hence better results and less depression.