Insurgent Mexico by John Reed

Villa was an outlaw for twenty-two years. When he was only a boy of sixteen, delivering milk in the streets of Chihuahua, he killed a government official and had to take to the mountains. The story is that the official had violated his sister, but it seems probable that Villa killed him on account of his insufferable insolence. That in itself would not have outlawed him long in Mexico, where human life is cheap; but once a refugee he committed the unpardonable crime of stealing cattle from the rich hacendados. And from that time to the outbreak of the Madero revolution the Mexican government had a price on his head.

Villa was the son of ignorant peons. He had never been to school. He hadn't the slightest conception of the complexity of civilization, and when he finally came back to it, a mature man of extraordinary native shrewdness, he encountered the twentieth century with the naïve simplicity of a savage.