Jihad
Jihad is classified into inner ("greater") jihad, which involves a struggle against one's own base impulses, and external ("lesser") jihad, which is further subdivided into jihad of the pen/tongue (debate or persuasion) and jihad of the sword. Most Western writers consider external jihad to have primacy over inner jihad in the Islamic tradition, while much of contemporary Muslim opinion favors the opposite view. Gallup analysis of a large survey reveals considerable nuance in the conceptions of jihad held by Muslims around the world.