Moments before he was shot to death by a soldier of the Bolivian government, the revolutionary Ernesto “Che” Guevara told his executioner, “Shoot, coward! You are only going to kill a man!” Guevara died a short time later, on October 9, 1967 at the age of 39, but he was correct in his assertion that this would not be the end of his legacy. Today, that legacy almost always takes the form of a…