The first-hand experience Rivera had from growing up as a migrant worker provided him with writing material for his literary works. His novel "...y no se lo tragó la tierra" is semi-autobiographical and is based around the migratory life of a young boy. As Rivera grew up in the late 20th century, he discovered some of the difficulties Chicanos faced as lower-class Mexican descendants. While trying to get published, Rivera encountered some racism; this was mainly because his writings were in Spanish, thus restricting his audience. The unjust and frustrating situation faced by many Chicanos motivated Rivera. He understood that the only way to get ahead in life was through education. Rivera graduated with a degree in English from the Southwest Texas State University in 1958 and taught English and Spanish at secondary schools from 1957 to 1965. He strongly believed that post-secondary education was the only way Chicanos could evolve from migrant work. He worked in public schools until he could further his education at the University of Oklahoma, where he graduated with a PhD in Romance Languages and Literature in 1969. Rivera's extensive education gave him the step up that he needed. Rivera was (and is) a role-model for young Chicanos throughout the United States because of his involvement in the community and his success as a scholar and writer.