Sway is worth the read even if only for the chapter titled Compensation and Cocaine in which the exclusive properties of the brain’s altruistic center and self-interest center are examined. It turns out that a person’s charitable motivations cannot co-exist with monetary motivations. Sway examines a few studies to illustrate this point, focusing around situations in which multiple choice test participants were either rewarded financially for correct answers, were rewarded by donations to a charity, or were not rewarded at all. Simply stated, the results indicate that when personal compensation is factored into the tests, scores dropped dramatically. The chapter goes into more depth, of course, and examines the results further than my altruistic generalities above indicate. This is to say that Sway is worth the read, definitely.