The singer-songwriter known for their work in folk music is Bob Dylan. Emerging in the early 1960s, Dylan became a prominent voice for social change through his music, combining poetic lyrics with a distinctive sound. His songs, including "Blowin' in the Wind" and "The Times They Are A-Changin'," captured the spirit of the counterculture movement and addressed pressing social issues such as civil rights and war. Dylan's innovative approach has had a lasting influence on folk music and popular culture.