Will Geer was an American actor and activist, best known for his role as Grandpa Zeb in the popular television series The Waltons. Born on April 9, 1912, in Frankfort, Indiana, he had a diverse career in theater, film, and television, spanning several decades. In addition to acting, Geer was a passionate advocate for social justice and environmental causes. He co-founded the Theatricum Botanicum, a theater in California that focused on producing classic plays and promoting ecological awareness. Geer's contributions to both the arts and activism left a lasting impact on American culture.