Man's World is a song recorded, written, and produced by Welsh singer-songwriter Marina for her upcoming untitled fifth studio album. The song was also produced by American musician Jennifer Decilveo, who Marina enlisted as part of her effort to work with an all-female production team. It was released as the album's lead single on 18 November 2020 by Atlantic Records. Several remixes of the song were commissioned by Atlantic and are scheduled to be released in the months leading up to her album, including one produced by American band Muna. The song is a midtempo alternative pop track with a piano-driven beat and a dreamy sound. Its lyrics criticize history's oppressive treatment of women and minority groups, and Marina admits that she does not "want to live in a man's world anymore".