In 1971, Bruce Neuburger—young, out of work, and radicalized by the 60s counterculture in Berkeley—took a job as a farmworker on a whim. He could have hardly anticipated that he would spend the next decade laboring up and down the agricultural valleys of California, alongside the anonymous and largely immigrant workforce that feeds the nation. This account of his journey begins at a remarkable moment, after the birth of the United Farm Workers union and the ensuing uptick in...