The National Liberation Party, known as Partido de Liberación Nacional (PLN), is a political party in Costa Rica. Founded in 1951, it has played a significant role in the country's political landscape, advocating for social democracy and progressive policies. The party has historically focused on issues such as education, healthcare, and social welfare. The PLN has been one of the dominant parties in Costa Rican politics, often alternating in power with its main rival, the National Restoration Party. The party's influence has shaped many of the nation's policies and development strategies, contributing to Costa Rica's reputation as a stable democracy in Central America.