Read chs. 6 and 7 in Freud's Civilization and Its Discontents. In the blue edition, this reading goes from pp. 75-96; in the black and white edition, it goes from pp. 103-129.
Also, click here to see some FAQ's about Steven Pinker's book The Better Angels of Our Nature, with answers by Pinker. He covers a wide range of topics and answers them in some detail.
