The rise and fall and fall and further fall and final victory of Alex. Alex victimized by his former droogs and former victims until he takes his final fall-the literal jump with his attempted suicide. The problem of free will in a world of at least Original Sin and probably Innate Depravity. But the cost of having an Alex around is very, very high. A Clockwork Orange may be seen in context of some of Kubrick's other films as part of an on-going investigation into human violence, especially violence by males.
Men kill, and die, when ordered to.
Cf. and contrast this debate with himself with Terry Gilliam's debate with Terry Gilliam on Romance.