This chapter examines how globalization has contributed to the growth of terrorism as a global phenomenon. It considers whether global terrorism is the price states pay for entry into and continued access to a globalized system, why violent Islamic extremism continues to be the primary motivator for global terrorist violence, and whether freedoms should be restricted to ensure greater security against the threat of global terrorism. The chapter first looks at the definitions of terrorism before tracing the transformation of terrorism from a transnational to a global phenomenon. It then explores the role of technology in terrorism and ways of combating terrorism. The two case studies in this chapter deal with activities of the so-called Islamic State in the Philippines and Mozambique since 2017 and the US ‘insurrection’ on 6 January 2021.