The ouster of Egyptian president Hosni Mubarak in February 2011 was brought about using the tools of nonviolent action, including massive protests and nationwide strikes. Yet the transition that followed showed that initiating change through nonviolent action is no guarantee of a peaceful, smooth path to democracy. This report, based on data on 72 political transitions that occurred between 1945 and 2019, provides key insights into the kinds of mobilization, in terms of tactics and actors, that tend to be most effective in carrying transitions to a democratic outcome.