Razão de Viver was introduced in 1964 by Os Gatos, an all-star group founded the same year by Eumir Deodato that recorded only two albums in different line-ups. The song was included on Os Gatos’ self-titled debut album featuring the composer on piano, Ed Maciel and Honorato on trombone, Paulo Moura on alto sax, J.T. Meirelles on tenor sax, Copinha on flute, Maurício Einhorn on harmonica, Neco and Durval Ferreira on guitar, Sérgio Barroso on bass and Wilson das Neves on drums.
