Why Was a Bicameral Legislature Established ..
Most of the countries in the world have bicameral systems (Spain, United Kingdom, Germany, etc). In 2013, Ireland voted to became an Unicameral country.
Why Was a Bicameral Legislature Established
The five tribes designed quite an elaborate political system. This included a bicameral (two-house) legislature, much like the British Parliament and modern U.S. Congress. The representatives, or , from the and tribes met in one house and those of the and met in the other. The sachems broke ties and had the power to veto decisions made by the others. There was an unwritten constitution that described these proceedings at least as early as 1590. Such a complex political arrangement was unknown in Europe at that time.
Bicameral System, legislative system in which the power of making the law is vested in two chambers, or houses, both of which must approve a bill before it becomes law. In general the upper house is composed of members selected on a territorial basis, representing states or other political subdivisions rather than the people directly, and usually serving for longer terms than the members of the lower house. In principle the upper house provides the legislative experience necessary to control unwise legislation. The lower house is generally composed of members selected on the basis of population, each member representing an equal number of citizens. Because of more frequent election and closer identification with the districts they represent, members of the lower house reflect more strongly the contemporary mind of the electorate.