The history, evolution and motivations of terrorism

Abstract

This research study examines the historical development of terrorism and the motivations driving terrorist groups across time. It seeks to answer how terrorism has evolved from antiquity to the present, what political, social, psychological, and economic factors motivate individuals or groups to engage in terrorism, and which criminological theories are most relevant to explaining terrorist behaviours. A qualitative research design was adopted, integrating historical analysis, thematic content analysis, and comparative case studies. The study reviews secondary sources and assesses for contrasting groups, the Sicarii, the Irish Republican Army (IRA), Al-Qaeda, and the Islamic State (ISIS) to capture shifts in ideology, organisational structure, and tactics. The findings reveal that terrorism is a dynamic phenomenon. Early groups like the Sicarii fused religious zealotry with nationalist aspirations and used targeted assassinations to destabilise Roman rule. The IRA linked nationalist grievances and sectarian discrimination with a dual strategy of guerrilla violence and political negotiation. Al-Qaeda globalised jihad through a decentralised network that exploited internet communications for propaganda and recruitment. ISIS combined apocalyptic ideology with proto-state governance, employing extreme violence and hybrid warfare while providing limited services. The results underscore that no single factor explains radicalisation; rather, political injustice, socio-economic marginalisation, perceived humiliation, and identity-based grievances converge with peer networks and charismatic leadership to justify violence. Criminology theories of strain, social disorganisation, and social learning illuminate why individuals turn to terrorism and why groups endure.