Proportionality's Function

In this paper I argue that punishment should be proportional to desert; that desert turns solely on culpability and not on results: that culpability is a function of what the actor perceives are the risks of his act to others' interests and the reasons he perceives that might justify, excuse, or aggravate taking those risks; that because culpability is a complex function, ordinally ranking acts in terms of culpability is quite difficult; that converting the ordinal ranking into cardinal measures of deserved punishment must perforce be controversial; and that deserved punishment, which is deserved suffering, must somehow deal with the fact that the actor may have already suffered undeservedly (or may have benefitted undeservedly).