Book excerpt: We all know we should give to charity, but who really does? In his controversial study of America's giving habits, Arthur C. Brooks shatters stereotypes about charity in America-including the myth that the political Left is more compassionate than the Right. Brooks, a preeminent public policy expert, spent years researching giving trends in America, and even he was surprised by what he found. In Who Really Cares, he identifies the forces behind American charity: strong families, church attendance, earning one's own income (as opposed to receiving welfare), and the belief that individuals-not government-offer the best solution to social ills. But beyond just showing us who the givers and non-givers in America really are today, Brooks shows that giving is crucial to our economic prosperity, as well as to our happiness, health, and our ability to govern ourselves as a free people.