What were the four classes of criminal identified by Ferri's fellow Italian academic, Garofalo?

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The Answer is Like Ferri he was convinced of the importance of scientific methodology to the study of crime. he introduced the notion of 'natural crime', which was defined by two essential characteristics: offending the moral sentiment of pity (revulsion against the voluntary infliction of suffering on others) and probity (respect for others' property rights) He then identified four classes of criminal: the murderer (in whom altruism is wholly lacking); the violent criminal (characterised by a lack of pity); thieves (characterised by a lack of probity) and, finally, lascivious criminals such as some sexual offenders (characterised by a low level of moral energy and deficient moral perception) Garofalo worked very much in the positivist tradition. He was convinced of the importance of scientific method, and was much more concerned with social interests than individual rights.

What Were the Four Classes of Criminal Identified by Ferri's