The Democracy Index is an index compiled by the Economist Intelligence Unit, that measures the state of democracy in 167 countries, of which 166 are sovereign states and 165 are United Nations member states. The index is based on 60 indicators grouped in five different categories measuring pluralism, civil liberties, and political culture. In addition to a numeric score and a ranking, the index categorizes countries as one of four regime types full democracies, flawed democracies, hybrid regimes and authoritarian regimes.