As argued in Who Rules America?, the owners and top executives of the largest corporations, banks, investment firms, and agri-businesses come together as a corporate community. Their enormous economic resources give them the "structural economic power" that is the basis for dominating the federal government through lobbying, campaign finance, appointments to key government positions, and a policy-planning network made up of foundations, think tanks, and policy-discussion groups. The CEOs and owners in the corporate community, along with the top executives at the foundations, think tanks, and policy-discussion groups, work together as a leadership group that I call the power elite. However, they do fight among themselves sometimes, leading to moderate-conservative and ultra-conservative factions in the power elite. This class-domination theory developed out of Power Structure Research, going back to the 1950s.