politics
politics, power, and war
educational reform
Brookings Institution
planning, strategy, and command and control
Heritage Foundation
organizations (environment and society)
media and communications
public policy
think tanks
Progressive Policy Institute
American Enterprise Institute
THINK TANKS CAN BE difficult to define, although they are usually nonprofit organizations with a significant research focus. Over time the boundary between objective policy evaluations, a traditional think tank activity, and policy advocacy have become blurred as think tanks have become increasingly involved in lobbying government. [Source: Encyclopedia of Politics: The Left and the Right: Volume 1: The Left and Volume 2: The Right; Think Tanks]
concepts