From 1924 to 1931, Chile's traditional oligarchical system collapsed. The crisis was resolved with the approval of a new Constitution in 1925 which enshrined the role of the middle classes and separated Church and State. In 1973, a coup d'etat marked the beginning of a military government which remained in power until March 1990. Most contemporary political thinking and ideologies are present in Chile. The opposition is composed of National Renovation, Independent Democratic Union, and the Center-Center Progressive Union.
Chile has a presidential system of government.
The Executive Power is exercised by the President of the Republic, elected by direct popular vote. The President is supported in his work by 21 cabinet ministers. Next election will take place on December, 2005. The Legislative power rests with the National Congress , located in the p ort city of Valpara so. The Judiciary is charged with the administration of justice .