What is the theme in Endgame by Samuel Beckett?

Life or death is a theme. The characters, trapped in their single room occupy themselves with routines and tasks. Hamm is paralyzed and blind, Nagg and Nell cannot leave their ashbins, and the action of the play occurs in a single room, outside of which life evidently cannot survive. These characters struggle to move on or take action, and the actions they do take are often stagnant and nondescript. Each is dependent upon another for his or her very survival and Hamm questions the benefit of continuing life at all, often pestering nag for the ultimate painkiller—death.