But perhaps the greatest attraction of Mormonism was the promise that each follower would be granted an extraordinarily intimate relationship with Go… - Jon Krakauer

I was irresistibly drawn to write about Latter-Day Saints not only because I already knew something about their theology, and admired much about their culture, but also because of the utterly unique circumstances in which their religion was born: the Mormon Church was founded a mere 173 years ago, in a literate society, in the age of the printing press. As a consequence, the creation of what became a worldwide faith was abundantly documented in firsthand accounts. Thanks to the Mormons, we have been given an unprecedented opportunity to appreciate — in astonishingly detail — how an important religion came to be.

Several authors and editors I respect counseled me not to write the book as quickly as I did; they urged me to wait two or three years and put some distance between me and the expedition in order to gain some crucial perspective. Their advice was sound, but in the end I ignored it - mostly because what happened on the mountain was gnawing my guts out. I thought that writing the book might purge Everest from my life. It hasn't, of course.

There is a dark side to religious devotion that is too often ignored or denied. As a means of motivating people to be cruel or inhumane — as a means of inciting evil, to borrow the vocabulary of the devout — there may be no more potent force than religion. When the subject of religiously inspired bloodshed comes up, many Americans immediately think of Islamic fundamentalism, which is to be expected in the wake of the September 11 attacks on New York and Washington. But men have been committing heinous acts in the name of God ever since mankind began believing in deities, and extremists exist within all religions. Muhammad is not the only prophet whose words have been used to sanction barbarism; history has not lacked for Christians, Jews, Hindus, Sikhs, and even Buddhists who have been motivated by scripture to butcher innocents. Plenty of these religious extremists have been homegrown, corn-fed Americans.
Faith-based violence was present long before Osama bin Laden, and it ill be with us long after his demise. Religious zealots like bin Laden, David Koresh, Jim Jones, Shoko Asahara, and Dan Lafferty are common to every age, just as zealots of other stripes are. In any human endeavor, some fraction of its practitioners will be motivated to pursue that activity with such concentrated focus and unalloyed passion that it will consume them utterly. One has to look no further than individuals who feel compelled to devote their lives to becoming concert pianists, say, or climbing Mount Everest. For some, the province of the extreme holds an allure that's irresistible. And a certain percentage of such fanatics will inevitably fixate on the matters of the spirit.
The zealot may be outwardly motivated by the anticipation of a great reward at the other end — wealth, fame, eternal salvation — but the real recompense is probably the obsession itself. This is no less true for the religious fanatic than for the fanatical pianist or fanatical mountain climber. As a result of his (