t is taken for granted, even among many Washington policymakers, that Islam is a fundamentally peaceful religion and that Islamic jihad terrorism is something relatively new, a product of the economic and political ferment of the twentieth century. But in The History of Jihad: From Muhammad to ISIS, Islamic scholar Robert Spencer proves definitively that Islamic terror is as old as Islam itself, as old as Muhammad, the prophet of Islam, who said “I have been made victorious through terror.” Spencer briskly traces the 1,400-year war of Islamic jihadis against the rest of the world, detailing the jihad against Europe, including the 700-year struggle to conquer Constantinople; the jihad in Spain, where non-Muslims fought for another 700 years to get the jihadi invaders out of the country; and the jihad against India, where Muslim warriors and conquerors wrought unparalleled and unfathomable devastation in the name of their religion.