In 50s county became member of NATO and ally of United States that helped to revive Italian economy through Marshall Plan. Italy signed treaties of the Roman foundation and European economic country that became European Union in 1993.

In 1957 it signed Treaties of Rome, late from 1960s till 1980s, century experienced some hard economic crisis as well as years of Lead, period was characterized by the widespread social conflicts and many terroists acts that carried out by the extra-parliamentary movements. In 1996 elections held to led victory of center-left under leadership the Romano Prodi. First government of Prodi became third longest that stay in the power before narrowly lost vote of confidence with by only 3 votes. In 1998 new government was formed but in April 2000 Massimo D' Alema resigned. Italy also participated in U.S military coalition in the Iraq.

Under leadership of Silvio, center-right formed the government and Silvio was also able to remain in the power for complete his fiver years of mandate government, it was with two different governments. First one from 2001to 2005, which became longest live in the governmental power for Italy, while the elections of 2006 were won by center-left, which was allowing Prodi to form the second Government in Italy. In early 2008 Prodi resigned, it was because having collapse with his coalitions. In April 2008, ensuing new elections, Silvio won election and formed the government third time.