Right-wing extremist violence has been deadlier than left-wing violence in recent years. Without harmonized reporting and uniform definitions, the data will not provide an accurate overview of political violence in the U.S. Right-wing extremist violence has been more frequent and more lethal than left-wing violence. Yet the empirical record shows that political violence remains concentrated within specific movements and networks rather than spread evenly across the ideological spectrum. But research shows that the majority of political violence comes from people following right-wing ideologies.