The Global Terrorism Database (GTD) from UMD is an open-source database including information on domestic and international terrorist events from 1970 through 2016.
Public opinion surveys around the world on a broad array of subjects ranging from people's assessments of their own lives to their views about the current state of the world and important issues of the day.
Political Regime Characteristics and Transitions 1800-2010, by coding the authority characteristics of states in the world system for purposes of comparative, quantitative analysis.
