An analysis of the Global Terrorism Database by researchers at the University of Maryland published in 2017 shows a “sharp increase” in the share of attacks by right-wing extremists, from 6% in the 2000s to 35% in the 2010s. The share of attacks by religious extremists also increased, from 9% to 53% between the two decades.
Meanwhile, the share of attacks by left-wing terrorists and environmentalist extremists dropped from 64% in the 2000s to 12% in the 2010s.