This article will trace the development of jihad through early Islamic history into the present day, and will focus on how jihad in concept and practice has been appropriated and distorted by Muslim extremists as part of their violent campaign against the West and their own governments. Jihad as a centerpiece of radical thought is illustrated by examining the doctrines of prominent extremist groups such as Hamas and Egyptian Islamic Jihad. Misuse of the term by prominent extremist leaders, such as Osama bin Laden and others is also addressed.