Carlos Luis Fallas was a prominent Costa Rican writer and social activist, born on April 27, 1909. He is best known for his novels that depict the struggles of the working class and the injustices they faced. His most famous work, Mamita Yunai, highlights the exploitation of banana plantation workers in Costa Rica, reflecting his deep commitment to social issues. Fallas was also involved in politics and labor movements, advocating for workers' rights throughout his life. He was a member of the Communist Party and used his literary talents to promote social change. Fallas passed away on August 7, 1966, leaving a lasting impact on Costa Rican literature and society.