Nobody woke up on January 1, 1860, and knew what was coming. What followed was not a single dramatic rupture but fifty-two weeks of ordinary-seeming decisions, each one making the next, more extreme decision look a little more reasonable than it would have looked in isolation.

This week-by-week narrative traces the year America's political system worked exactly as designed and produced a result a large portion of the country had already decided, in advance, it would not accept. It follows the Democratic Party's collapse at two chaotic conventions, the outsider maneuvering that handed Lincoln a nomination everyone expected Seward to win, a campaign in which one candidate said almost nothing in public while another broke every rule of the era to warn of the catastrophe he saw coming, and the six-week cascade of panic, resignations, and unanimous votes that followed Lincoln's election, ending with a single fort in Charleston harbor and a country that could no longer imagine itself whole.

Grounded in the actual sequence of conventions, telegraph dispatches, and convention-floor walkouts rather than a compressed after-the-fact summary, this is history told at the pace it was actually lived, by people guessing, hedging, and posturing without knowing how it would end. For readers who want to understand not just that the Union broke, but exactly how, week by week, it came apart.