International experience of state building shows that the democratization of society is possible only through the involvement of broad social layers in the process of exercising power through various representative bodies. At the present stage parliamentarism is a widespread phenomenon and is characterized as a progressive, democratic society management system. Today parliamentary institutions operate in more than 190 countries, and nearly seventy of them are bicameral, the others are unicameral parliaments. A Parliament is the only institution that represents the society as a whole and its diversity. Its primary task is consolidation of diverse political interests in society. In addition, a Parliament in developed countries has an important communicative function of establishing a variety of relationships and relationships with other institutions of the state and society. It is for this reason that a Parliament is a system-forming factor in the context of statehood and democracy. Parliamentarism is a sign of maturity of democracy, rights and freedoms of a person and of a citizen, high level of development of civil society. It reflects specific features of development of a society at any given point in history, defined, including national traditions, by legal culture and political will of the people.

Since the late of XIX century, the parliamentary system is characterized as a mass political phenomenon. In some countries, the masses become active participants in the management process, and parliamentary institutions appear in the political system of these societies. It would be erroneous however to assume that the development of parliamentarism was linear and didn't have any obstacles. The history of evolution of the parliamentary system shows a series of victories and defeats of this institution that generated a lot of its forms and varieties. Nowadays the parliamentary system exists in the political system of most countries of the world. Andin different societies it’s natural for this institution to have its own specifics that actualizes the issue raised in this article.