Raise Your Hand

A common feature of democracy as currently understood and practiced is competitive elections. Competitive elections are usually seen to require freedom of speech, freedom of the press, and some degree of rule of law. Civilian control of the military is often seen as necessary to prevent military dictatorship and interference with political affairs. In some countries, democracy is based on the philosophical principle of equal rights.

"Majority rule" is a major principle of democracy, though many democratic systems do not adhere to this strictly—representative democracy is more common than direct democracy, and minority rights are often protected from what is sometimes called "the tyranny of the majority". Popular sovereignty is common but not a universal motivating philosophy for establishing a democracy.

A voting system allows voters to choose between options, often in an election where candidates are selected for public office. Voting can be also used to award prizes, to select between different plans of action, or by a computer program to find a solution to a problem. Voting can be contrasted with consensus decision making.

A voting system contains rules for valid voting, and how votes are aggregated to yield a final result. The study of formally defined voting systems is called voting theory, a subfield of political science, economics or mathematics. Voting theory began formally in the 18th century and many proposals for voting systems have been made.

Voting systems are either majority rule, proportional representation or plurality voting. Given the simplicity of majority rule, those who are unfamiliar with voting theory are often surprised that another voting system exists, or that "majority rule" systems can produce results not supported by a majority. If every election had only two choices, the winner would be determined using majority rule alone. However, when there are three or more options, there may not be a single option that is preferred by a majority. Different voting systems may give very different results, particularly in cases where there is no clear majority preference.