The key insight of Adam Smith's Wealth of Nations is misleadingly simple: if an exchange between two parties is voluntary, it will not take place unless both believe they will benefit from it. Most economic fallacies derive from the neglect of this simple insight, from the tendency to assume that there is a fixed pie, that one party can gain only at the expense of another.
It's funny that there was so much disturbance about having a Catholic in the White House with Kennedy, and when we finally get a religion in the White House that's causing a lot of conflicts, and concerns, and disturbances for a lot of people, it's in the Bush Administration.