Jason Burke's new book, 'The Revolutionists,' chronicles the evolution of global terrorism from an age of unchecked travel to the rise of jihadist movements. Drawing on extensive reporting, declassified documents, and interviews, Burke details the transformation of terrorism, presenting a narrative that is both thrilling and historically rigorous. The book covers the period up to the early 1980s, highlighting the shift from secular, leftist terrorism to the dominant jihadist ideologies of today.