Parliamentarism is the most widely adopted system of government, and it seems appropriate to refer to British Parliamentary experience in particular because it is the British system which has provided an example for a great many other countries.Great Britain is regarded as mother country of the parliamentary executive. A parliamentary system, or parliamentarism,is distinguished by the head of government being dependent on the direct or indirect support of the parliament, often expressed through a vote of confidence. Hence, there is no clear cut separation of powers between the legislative and executive branches of government. Parliamentary systems usually have a clear differentiation between the head of government and the head of state.
The term parliamentary system does not mean that a country is ruled by different parties in coalition with each other. Such multi-party arrangements are usually the product of a voting system known as proportional representation. The executive is typically a cabinet, and headed by a prime minister who is considered the head of government. The prime minister and the ministers of the cabinet typically have their background in the parliament and may remain members therof while serving in cabinet. The leader of the leading party, or group of parties, in the parliament is often appointed as the prime minister.
In many countries, the cabinet, or single member therof, can be removed by the parliament through the vote of confidence. In addition, the executive often can dissolve the parliament and call extra ordinary elections. The parliamentary executive is most effective when supported by a stable majority, which is most likely to be found in countries having a strong two party system. Many countries that have instituted the cabinet system have been hampered in their operation by their multiparty systems, which have created indecisive and unstable cabinets.
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