The Chilean political context has changed significantly over the past twenty years, today made after the constitutional reforms aimed at the elimination of authoritarian enclaves, the conditions exist to promote an agenda of political and institutional development, establishing a parliamentary system of government through a new Constitution, since Chile is eligible to institutionalize a balance between the executive and legislative power, because of the strength of its party system (multi) and the need to encourage and strengthen partnerships majority of government.

The interest the debate on the political system wakes up in most Latin American countries is not accidental, the crisis of political stability, democracy and governance have been identified with the life of a presidential system of government, bringing this vision as an obvious consequence, the idea of institutional changes facing the model of parliamentary forms.

The comparative study of the institutions of the various political regimes, has sought to define what are the best forms of government to democracy. The well-known thesis of Professor Juan Linz (1987) which tells the advantages of parliamentarism and presidentialism defects, marked the beginning of a debate about the relationship and influence of forms of government (parliamentary, presidential or semi-) processes democratic. This debate has been alien to our country and demonstrated a cyclical basis in academic and political levels, however, still socially excluded from entry as a political-institutional need, or at least, presidentialism is not perceived as a problem area that warranted to be changed.

Although in comparative terms, the Chilean political system observes high levels of institutions, noting some structural disadvantages for the political regime that must be neutralized, about greater collaboration between relations executive with the legislative and legal and constitutional mechanisms that give flexibility to the system to resolve a potential crisis of government policy. The breakdown of the presidential regime in 1973, is an example of this, and as stated by Professor Valenzuela (1997) if the scheme had been Chilean parliament, would not have been the coup, as the sum of conflicts are in this regime a natural resolution, preventing the risk that a government's political crisis resulting in a crisis of political regime.