Alternate histories. Alternate realities. It's said that every choice creates multiple timelines, each one exploring what could have happened if a different decision had been made. Most of these alternate histories stem from different outcomes to a pivotal battle, or to an assassination attempt, or to the ending or escalation of a war. All violent, all bloody, all brutal. But what about those choices made during peacetime, when there was no monumental, ongoing conflict? After all, everyone knows how significant the flutter of a butterfly's wings can be, how far-reaching its effects can be felt. In these pages you will find fifteen new branches of history written by some of today's greatest science fiction and fantasy writers.