Ebony and Ivory "Billboard" Hot 100 charts. At the simplest level, the song is about the ebony (black) and ivory (white) keys on a piano, but also deals with integration and racial harmony on a deeper, human level. The title was inspired by McCartney hearing Spike Milligan say "black notes, white notes, and you need to play the two to make harmony, folks!". The figure of speech is much older. It was popularised by James Aggrey in the 1920s, inspiring the title of the pan-African journal "The Keys", but was in use from at least the 1840s. Written by McCartney alone, the song
Paul McCartney and Wings all-star collection of musicians in London in aid of UNICEF and Kampuchean refugees. Also during this tour, a live version of the "McCartney II" track "Coming Up" was recorded in Glasgow and became Wings' sixth US number one hit the following year. Paul McCartney and his family arrived in Japan on 16 January 1980 for the planned eleven-date Wings' concert tour of Japan (due to visit Budokan Hall, Tokyo from 21 to 24 January 1980; Aichi-Ken, Taiiku-Kan, Nagoya on 25–26; Festival Hall, Osaka on 28; Osaka Furitsu-Kan, Osaka on 29; Budokan Hall, Tokyo from 31 January to 2 February 1980).