"La Boheme" was composed by Puccini, but he didn't start from scratch. He used a libretto by two other people, based on a collection of stories by yet another person.
"We are social creatures to the inmost centre of our being. The notion that one can begin anything at all from scratch, free from the past, or unindebted to others, could not conceivably be more wrong."
Karl Popper, philosopher,1902-1994