What is the theme in Peter Pan by J. M. Barrie?

Duty and responsibility—or a lack thereof— drive the actions of many characters in Peter Pan. Peter Pan wants to avoid all adult responsibility and goes to great lengths to achieve this goal. He refuses to play father to Wendy's mother, uncomfortable even when pretending the role. In the end, when Wendy and her brothers decide to go back home, Peter will not let himself be adopted by the Darlings as the other Lost Boys are.