The World is a Safer Place

In “The Looming Tower: Al-Qaeda and the Road to 9/11,” Lawrence Wright’s monumental examination of the jihadist movement that threatens the civilized world, characters other than Osama Bin-Laden emerge as the network’s chief ideologues. The handful of Americans who still read newspapers regularly are familiar with names like Zarqawi and Ayman al-Zawahiri. Less known, but...