Jihadism is a neologism for modern, armed militant Islamic movements that seek to establish states based on Islamic principles. In a narrower sense, it refers to the belief that armed confrontation is an efficient and theologically legitimate method of socio-political change towards an Islamic system of governance. The term "jihadism" has been applied to various Islamic extremist or Islamist individuals and organizations with militant ideologies based on the classical Islamic notion of lesser jihad.
Jihadism has its roots in the late 19th- and early 20th-century ideological developments of Islamic revivalism, which further developed into Qutbism and Salafi jihadism related ideologies during the 20th and 21st centuries. Jihadist ideologues envision jihad as a "revolutionary struggle" against the international order to unite the Muslim world under Islamic law.