The four terrorist groups responsible for the most deaths in 2019 were the Taliban, Boko Haram, ISIL and Al-Shabaab. These four groups were responsible for 7,578 deaths from terrorism, representing 55 per cent of total deaths in 2019. Three of these four were also the deadliest groups last year, with Al-Shabaab replacing the Khorasan Chapter of Islamic State this year. In 2012, just prior to the large increase in terrorist activity around the world, these four groups were responsible for just over 31 per cent of all deaths from terrorism.
