"If I Had a Hammer" is a folk song written by Pete Seeger and Lee Hays in 1949. The song expresses a desire for social change and justice, using the metaphor of a hammer to symbolize the tools needed to build a better world. It emphasizes themes of love, freedom, and equality. The song gained popularity during the civil rights movement and was famously performed by Peter, Paul and Mary in the 1960s. Its catchy melody and powerful message resonated with many, making it an anthem for those advocating for social reform and unity across various movements.