What does it feel like to starve? To feel your body cry out for nourishment, to think only of food? How many fitful, hungry nights must pass before dreams of home-cooked meals metastasize into nightmares of cannibalism? Why would anyone volunteer to find out?

In The Great Starvation Experiment, historian Todd Tucker tells the harrowing story of thirty-six young men who willingly and bravely faced down profound, consuming hunger. As conscientious objectors during World War II, these men were eager to help in the war effort but restricted from combat by their pacifist beliefs. So,...