While still in his early 20's, and under Hitler's shadow, Leonid "Leo" Hurwicz (1917-2008) left his home in Warsaw, Poland, seeking safety and a degree at the London School of Economics. The following years, while challenging and potentially life-threatening, contained the seeds of a lifelong intellectual adventure. Leo's story is personal (born a refugee, precarious war years for himself and his Polish-Jewish family, a new life in America), global (revolutions, wars, depressions), ideological (socialism, capitalism, economic planning, free markets) and professional (a sixty-year career as a professor of economics leading ultimately to a Nobel Prize). This book tells that story.