This article argues for a central role for personality in mediating be
tween the genetic and environmental forces which act as causal agencie
s on the one hand, and the criminal behaviour that is to be explained
on the other. Such a causal chain must of course also incorporate the
biological-hormonal intermediaries between DNA and personality. In add
ition we require an explanation for the specific behaviours that make
up anti-social conduct, and it is suggested that this is to be found i
n Pavlovian conditioning. The evidence relating to these theories is r
eviewed, and suggests a fairly definite framework which also leads to
some suggestions concerning the reduction of criminality.