There's no such thing as good and evil. There are simply good intentions with evil consequences and poor intentions which may not have any recognizable consequences. Most people just want to be happy. Some people don't know how. Some believe they can fill their void through power. Power is obtained/expressed in several differing ways: Competition & Control (over money, over people probably through money or fear, maybe even over animals or technology) being just two.

If we are looking at good and evil as qualifiers for some deity to judge us by, then we'll all be deemed evil for some reason or another.