American Enterprise Institute (AEI), a private nonprofit American institution of research founded in 1943 by American industrialist Lewis H. Brown. One of the oldest and most-influential
think tanks in the
United States, it supports
limited government, private enterprise, and democratic capitalism ... From its founding the AEI played a prominent role in politics in the United States, and people
affiliated with the organization have served in influential government positions. Its
influence grew stronger during the administration of Pres. George W. Bush, in which
Dick Cheney, an AEI member, served as vice president of the United States