you know very much about bacteria. and i am going to agree what you said about bacteria can survive in a wider environment than human can. i am not going to argue with you about this anymore. but DO NOT forget what i am talking about in my artical (i am yunyi by the way) is CULTURE. within culture study we adopt the term "evolution" because the natural selection rule is also applying to social competition. there is nothing to do with "bacteria". i am comparing west and east culture, not human and bacteria.