A Farewell to Alms: A Brief Economic History of the World, by Gregory Clark
This is economic non-fiction, so it's not for everyone. I keep thinking about this one, a few months after I finished it. It seems that Clark thinks that Malthus had a completely correct theory about how economic development worked, that fell apart completely for all subsequent development, because of the industrial revolution. England led the industrial revolution because the upper class had more children, who pushed down into the middle and lower classes, diffusing the necessary work ethics and knowledge/ideals throughout British society. Hmm.