This chapter explores the importance of adapting for a composer, whether that be in their own creative practice (for example by adapting stories for the stage or screen) or in their engagement with others’ works through arrangements or orchestrations. It considers what a suitable definition of adaptation might be, and where the boundaries of originality might lie in adapting someone else’s work, before arguing that adaption necessitates a valuable set of composition skills that require us to think actively and conscientiously about our role in history and society.