The U.S. was created to foster human flourishing. The means to that end was the exercise of liberty in the pursuit of happiness. Capitalism is the economic expression of liberty. The pursuit of happiness, with happiness defined in the classic sense of justified and lasting satisfaction with life as a whole, depends on economic liberty every bit as much as it depends on other kinds of freedom.
“Lasting and justified satisfaction with life as a whole” is produced by a relatively small set of important achievements that we can rightly attribute to our own actions. Arthur Brooks, my colleague at the American Enterprise Institute, has usefully labeled such achievements “earned success.” Earned success can arise from a successful marriage, children raised well, a valued place as a member of a community, or devotion to a faith. Earned success also arises from achievement in the economic realm, which is where capitalism comes in.