Harry Nilsson, a prolific songwriter in the 1960s and 70s, created and first recorded the song One. Born in 1941, he moved to Los Angeles, attended the Paramount Theater, and later worked at a bank while writing and recording demos.
Harry wrote "One" after receiving a busy signal while writing lyrics. Nilsson's 1968 album, Aerial Ballet, features the phone's busy tone in the background, with some versions focusing less on the sound.
Harry Nilsson's One album and Three Dog Night gained global popularity, but it's important to acknowledge that one can be lonely and happy, and the debate on loneliness continues.