In 1914, a train pulled into a provincial British railway station. The porter, a curious chap, asked the regiment of soldiers where they were from. "Ross-shire," one called down, but the porter heard "Russia." And so began a rumor that led to Germany losing World War I. Often the history we learn at school is only half the story. We hear of heroic deeds and visionary leaders, but we never hear about the people who turned up late for court and thereby changed the law, or who stood in the wrong queue at university and accidentally won a Nobel Prize. "The Great Cat Massacre: A History of Britain...