On the 250th anniversary of America's founding - a landmark history of the US Constitution for a troubling new era. The US Constitution is among the oldest constitutions in the world - and one of the most difficult to amend. Although nearly twelve thousand amendments have been proposed since 1789, only twenty-seven have ever been ratified.

Tellingly, the Constitution has not been meaningfully amended since 1971. Without amendment, the risk of political violence rises. So does the risk of constitutional change by presidential power.

Leading Harvard historian Jill Lepore captures the stories of generations of ordinary people who have attempted everything from abolishing the Electoral College to guaranteeing environmental rights, hoping to mend their nation. Recounting the history of America through centuries of efforts to realize the promise of the Constitution, we witness how nearly all those bids have failed.