The paper is an analysis of the different typology, forms and aspects of terrorism in its modern incarnation. It is a critical and thorough analysis of the varied manifestations of terrorism in the international political system. The paper shows that terrorism has evolved with modernity. Terrorism in its new variation is what this paper has called ‘Terrorism 4.0.’ Terrorism 4.0 (T4) has two basic and definable characteristics: it is fratricidal and genocidal in nature. The paper explores the different strategies and tactics employed by various and distinct terrorist groups to destabilize states in the international political system using T4 in combination with traditional terrorism practices. By drawing on the activities of non-state actors such as ISIS, Al-Qaeda, Tehrik-i-Taliban , Al-Shabaab, Boko Haram, Hamas and Hezbollah, the paper shows that terrorism has evolved beyond its traditional conceptions in the 20thcentury.