Key historical figure for immigrant farm worker organization in California.
He immigrated with his mother and two uncles to California before attaining a master's degree in history from Stanford University in 1929.
He was the leader of several strikes for the AFL, and also exposed, in his 1964 expose 'Merchants of Labor', abuses within the Bracero Program, which were a series of laws and diplomatic agreements, initiated in 1942, for the importation of temporary contract laborers from Mexico to the United States.
He lived and traveled with his wife Mae.
His book led to the end of the Bracero Program, and allowed Cesar Chavez to start unionizing immigrant farmworkers.