The document discusses the two-party system of American government. It provides historical context for how the two-party system emerged and has been maintained over time through factors like single-member districts, winner-take-all elections, and laws protecting the major parties. While the two parties aim to find consensus, there have been times of ideological division in US history around issues like the Civil War and Vietnam War. The document also contrasts the two-party system with multiparty systems in other countries.