So is the fifth studio album by English singer-songwriter Peter Gabriel released in 1986. After working on the soundtrack to the film Birdy (1984), producer Daniel Lanois was invited to remain at Gabriel's Somerset home during 1985 to work on his next solo project.
Gabriel drew on various musical influences, fusing pop, soul, and art rock with elements of traditional world music, particularly African and Brazilian styles. It is Gabriel's first non-eponymous album, So representing an "anti-title" that resulted from label pressure to "properly" market his music. Gabriel toured So on the This Way Up tour (1986–1987), with some songs performed at human rights and charity concerts during this period.