Italy has the third largest economy in the Eurozone (the eighth-largest in the world) and the highest life expectancy in the EU, due to a very high human development index. Italy plays a prominent role in global military, cultural and diplomatic affairs and is also considered to be a major regional power. Italy is a founding and leading member of the European Union. The country is a member of numerous international institutions, including the UN, NATO, the OECD, the OSCE, the DAC, the WTO, the G6, G7, G8, G10, G20, the Union for the Mediterranean, the Latin Union, the Council of Europe, the Central European Initiative, the ASEM and the Uniting for Consensus. Italy is home to the greatest number of World Heritage Sites (51).