Sociopath's Road to Redemption

+
|
|  addict                  slayer
|
|               warrior
|
|  nihilist                pacifist
|_____________________ +
0

(y = desire to kill, x = desire to live)

So, the sociopath starts out as a machine.  As he loses power, he drifts towards nihilism.  But then, as he is starting to love and desire life, his lover is threatened.  He returns to killing but later repents and becomes a pacifist.  Finally, he is needed to be a hero and returns to reluctant killing as a warrior.