Humans have never known what is the best life. Even if they guessed it, they certainly do nt know how to achieve the best life. Even if they happen to guess what the conditions for achieving the best life are, they must not do it. This is an incredible fact, but it does, fundamentally, because good things of humanity require universal cooperation, and flaws in human nature always make any universal cooperation void. The main meaning of this text is:. ['Achieving the best life is the goal pursued by humans.', 'Only universal cooperation can achieve a better life for humankind.', 'Defects in humanity prevent human beings from achieving their best lives.', 'Defects of human nature with anti-cooperation.']