In political and sociological theory, the elite (élite, from eligere, to select or to sort out) are a small group of powerful people who hold a disproportionate amount of wealth, privilege, political power, or skill in a group. Defined by the Cambridge Dictionary, the "elite" are "those people or organizations that are considered the best or most powerful compared to others of a similar type." American sociologist C. Wright Mills states that members of the elite accept their fellows' position of importance in society. "As a rule, 'they accept one another, understand one another, marry one another, tend to work, and to think, if not together at least alike'." It is a well-regulated existence where education plays a critical role. Youthful upper-class members attend prominent preparatory schools, which not only open doors to such elite universities as Harvard, Yale, Princeton, and the University of Pennsylvania, but also to the universities' highly exclusive clubs. These memberships in turn pave the way to the prominent social clubs located in all major cities and serve as sites for important business contacts. According to Mills, men receive the education necessary for elitist privilege to obtain their background and contacts, allowing them to enter three branches of the power elite, which are; The Political Leadership: Mills contended that since the end of World War II, corporate leaders had become more prominent in the political process, with a decline in central decision-making for professional politicians. The Military Circle: In Mills' time a heightened concern about warfare existed, making top military leaders and such issues as defense funding and personnel recruitment very important. Most prominent corporate leaders and politicians were strong proponents of military spending. The Corporate Elite: According to Mills, in the 1950s when the military emphasis was pronounced, it was corporate leaders working with prominent military officers who dominated the development of policies. These two groups tended to be mutually supportive.