The emergence of the Fridays for the Future (2018), and Black Lives Matter (in 2013) movements are two reminders that young people are increasingly leading change in society. These political movements lack centralized leadership yet have matured into global phenomena, thanks to grassroots civic action by their young supporters. Young people are becoming more active citizens in many other ways: sharing media online, voting and filing petitions. Understanding under what conditions young people can change the world is increasingly a priority for policymakers.