In May 1315, it started to rain. For the seven disastrous years that followed, Europeans would be visited by a series of curses unseen since the third book of Exodus: floods, ice, failures of crops and cattle, and epidemics not just of disease, but of pike, sword, and spear. All told, six million lives--one-eighth of Europe's total population--would be lost.

With a category-defying knowledge of science and history, William Rosen tells the stunning story of the oft-overlooked Great Famine with wit and drama and demonstrates what it all means for today's discussions of climate change.