A rock opera and a concept record, its story explores Pink, a jaded rockstar that bassist Roger Waters modeled after himself and band founder Syd Barrett. Pink's life begins with the loss of his father during the Second World War and continues with abuse from his schoolteachers, an overprotective mother, and the breakdown of his marriage; all contribute to his eventual self-imposed isolation from society, symbolised by a wall. The band, who were then struggling with personal and financial difficulties, supported the idea. The Wall is the last album to feature Pink Floyd as a quartet; keyboardist Richard Wright was fired by Waters during production, but stayed on as a salaried musician. The record was promoted with three singles: "Another Brick in the Wall, Part 2" (Pink Floyd's only US number-one single), "Run Like Hell", and "Comfortably Numb". From 1980 to 1981, Pink Floyd embarked on The Wall Tour, which was notable for its elaborate theatrical effects. The concept was later adapted into a feature film of the same name, directed by Alan Parker and released in 1982.