The two party system in the US

A succinct explanation of how the two-party system emerged in the US, and why it was able to function for so long before an inevitable breakdown.

The Framers thought they were using the most advanced political theory of the time to prevent parties from forming. By separating powers across competing institutions, they thought a majority party would never form. Combine the two insights—a large, diverse republic with a separation of powers—and the hyper-partisanship that felled earlier republics would be averted. Or so they believed.

However, political parties formed almost immediately because modern mass democracy requires them, and partisanship became a strong identity, jumping across institutions and eventually collapsing the republic’s diversity into just two camps.

Yet separation of powers and federalism did work sort of as intended for a long while.