The Tyranny of the Two-Party System

The closely contested presidential election of 2000, which many analysts felt was decided by voters for the Green Party, cast a spotlight on a structural contradiction of American politics. Critics charged that Green Party voters inadvertently contributed to the election of a conservative Republican president because they chose to "vote their conscience" rather than "choose between two evils." But why this choice of two? Is the two-party system of Democrats and Republicans an immutable and indis