Every gain entails some loss—take this as a law of nature. A perfect success in any intellectual, political, or material endeavor is unattainable. Man is incapable of creating a perfect civilization in which he might achieve his full potential. The idea of a manmade earthly heaven is a utopian dream. Whenever a civilization makes a gain in one area, it is beset by loss in another area. A civilization can succeed in some of the things, but no civilization can succeed in everything. Nature has not equipped mankind with the ability to conceive and create a civilization that is free of contradictions and conflicts.