第18页 The Economic Revolution

But the very fact that he has had to depend on his fellow man has made the problem of survival extraordinarily difficult. Man is not an ant, conveniently equipped with an inborn pattern of social instincts. On the contrary, he seems to be strongly endowed with a self-centered nature. If his relatively weak physique forces him to seek cooperation, his inner drives constantly threaten to disrupt his social working partnerships. 
这段关于人性的描写和议论真的太棒了！