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Bicameralism

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Bicameralism is a way of making laws using two separate groups. These groups are called chambers or houses. In a bicameral system, both houses must often agree before a law can pass. This is called a concurrent majority. If only one group makes decisions, it is called unicameralism. About 40% of the world's national governments use two houses. The other 60% use just one house.

Unibicameral Map
Unibicameral Map

How these two houses work together can vary a lot. In some places, both houses have equal power. This is often seen in federal systems. In other places, one house is more powerful than the other. For example, in some systems, the lower house can overrule the upper house. The houses can talk to each other in different ways. They might send written messages or hold a joint session. A joint session is when both houses meet at the same time and place.

House of Lords Chamber
House of Lords Chamber

Many modern systems look back to the United Kingdom for ideas. The British Parliament is sometimes called the "Mother of Parliaments." This is because its rules helped shape many other nations. The roots of this system go back to the year 1341. That was when the Commons met separately from the nobility and clergy. Over time, the upper group became the House of Lords. The lower group became the House of Commons.

Casas del Parlamento. Palacio de Westminster - panoramio
Casas del Parlamento. Palacio de Westminster - panoramio

The United States also uses a two-house system. The Founding Fathers created the Senate and the House of Representatives. They wanted the Senate to be a calm and steady force. They thought the Senate would be more deliberate than the House. At first, state legislators chose the Senators. This changed in 1913 with the 17th amendment. Now, the people vote for Senators directly. The two houses also help balance power between different states.

12-07-13-washington-by-RalfR-10
12-07-13-washington-by-RalfR-10

Today, many countries use two houses to represent different groups. In federal countries like Brazil, Canada, and Nepal, the houses help balance power. For instance, the Senate might give every state the same number of seats. This helps smaller states have a voice alongside larger ones. Australia is a unique example of this mix. Its Senate is very powerful and can block laws from the lower house. Some people think two houses make change too slow. Others believe they provide important checks and balances.

Parliament House - panoramio (7)
Parliament House - panoramio (7)
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🖼️ Images & Media (9)
File:Casas del Parlamento. Palacio de Westminster - panoramio.jpg
Casas del Parlamento. Palacio de...
File:12-07-13-washington-by-RalfR-10.jpg
12-07-13-washington-by-RalfR-10.jpg
File:Glimpses of the new Parliament Building, in New Delhi (2).jpg
Glimpses of the new Parliament Building,...
File:Webysther 20180212163207 - Congresso Nacional.jpg
Webysther 20180212163207 - Congresso Nacional.jpg
File:Parliament House - panoramio (7).jpg
Parliament House - panoramio (7).jpg
File:Mosaika display, Centre Block, Parliament Hill.jpeg
Mosaika display, Centre Block, Parliament...
File:House of Lords Chamber.png
House of Lords Chamber.png
File:Legislaturas provinciales de Argentina.png
Legislaturas provinciales de Argentina.png
File:Unibicameral Map.svg
Unibicameral Map.svg
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