An observer will see the bizarre developments of behavior...

An observer will see the bizarre developments of behavior only in alien cultures, not his own. Nevertheless this is obviously a local and temporary bias. There is no reason to suppose that any one culture has seized upon an eternal sanity and will stand in history as a solitary solution of the human problem. Even the next generation knows better. Our only scientific course is to consider our own culture, so far as we are able, as one example among innumerable others of the variant configurations of human culture.