Three questions have usually been asked about the French Revolution: why did it happen?; why was it so violent? and what was its legacy? At first sight all three questions seem to beg other, more conceptually ambitious questions, whether about causation, violence or legacies. The aim of this short book is to answer both sets of questions by bringing together events with ideas. Combining the two actually helps to make the answers to the second, more conceptually oriented set of questions more historically and analytically focussed. It does so because the French Revolution owes much of its complexity to ideas and, more particularly, to the range and multiplicity of appearances and temporalities that ideas can lend to events. Complexity, not only in France and not only at the time of the French Revolution, is more than an effect of large numbers of people living in different circumstances with different, sometimes antagonistic, interests. It is also an effect of the range of occasionally compelling, but occasionally competing, emotional responses, moral evaluations and causal assessments made by, or of, people living in similar circumstances with similar, overlapping or complementary interests.