Pensamiento Serpentino is a poem by Chicano playwright Luis Valdez originally published by Cucaracha Publications, which was part of El Teatro Campesino, in 1973. The poem famously draws on philosophical concepts held by the Mayan people known as In Lak'ech, meaning "you are the other me." The poem also draws, although less prominently, on Aztec traditions, such as through the appearance of Quetzalcoatl. The poem received national attention after it was illegally banned as part of the removal of Mexican American Studies Programs in Tucson Unified School District. The ban was later ruled unconstitutional.

Luis Miguel Valdez is an American playwright, screenwriter, film director and actor. Regarded as the father of Chicano film and playwriting, Valdez is best known for his play Zoot Suit, his movie La Bamba, and his creation of El Teatro Campesino. A pioneer in the Chicano Movement, Valdez broadened the scope of theatre and arts of the Chicano community.