Between 1793 and 1794, thousands of French citizens were imprisoned and hundreds sent to the guillotine by a powerful dictatorship that claimed to be acting in the public interest. Only a few years earlier, revolutionaries had proclaimed a new era of tolerance, equal justice, and human rights. How and why did the French Revolution's lofty ideals of liberty, equality, and fraternity descend into violence and terror?

"By attending to the role of emotions in propelling the Terror, Tackett steers a more nuanced course than many previous historians have managed...Imagined terrors,...