A political party is an organized group of citizens who share similar political views and try to control the government through constitutional means. They educate citizens, contest elections, provide a link between the people and government, and more. There are three main systems of government - one party, two party, and multi-party. In a one party system only one party is allowed, in a two party system two major parties dominate, and in a multi-party system more than two parties operate together or in coalition. Regionalism and communalism can hinder India's political system when parties are formed along regional or religious lines rather than national interests.