Ah, today I came across an article that made me look for this thread (and Murray's first one). From the Atlantic:
The Brain on Trial. Addiction isn't the primary focus, but it is in there, and it's interesting stuff.
Also, did someone here post about the monkeys on St. Kitts and how their rates of alcoholism are similar to human ones? Here it is, sorry if it's a repeat:
YouTube - ‪Alcoholic Vervet Monkeys! - Weird Nature - BBC animals‬‏