Sérgio Buarque de Holanda (July 11, 1902 – April 24, 1982) was a Brazilian writer, journalist and sociologist. His greatest achievement was Raízes do Brasil, a landmark of Brazilian sociology, in which he developed the groundbreaking concept of the cordial man as the fundamental Brazilian identity. His son, Chico Buarque de Holanda is an accomplished singer-songwriter and novelist and his daughter Miúcha is also a famous singer.