Solution 1 ) The purpose of criminal law is to help maintain social order and stability . The purpose of criminal law is to establish a system of prohibitions , penalties and correctional measures to deal with conduct that unjustifiably or inexcusably causes or threatens harm to those individual or public interests for which state protection is appropriate . 2) Classification according to the nature of crimes Mala in se : These are acts that are immoral or wrong in themselves or acts that are naturally evil . Ex : Murder, rape , arson , burglary etc Mala prohibita : These crimes are not naturally evil , but are prohibited by statute because they infringe upon the right of the others . This type of act is not wrong in some societies but wrong in other societies . Example : Traffic offenses , gambling etc . Classification according to degree : a) Felonies : Crimes that are punishable by death or imprisonment in a state prision or penitentiary are felonies . b) Misdemeanors : Crimes or offenses not amounting to felonies are Misdemeanors . They are offenses for which the punishment is other than death or imprisonment in a state prison , or that have not been designated felonies by statute. c) Treason : Treason is the only crime described in the constitution and it is given a higher classification than felony . 3) Example of white-collar crimes are bank fraud, blackmail , bribery , computer fraud, counterfeiting , credit card fraud , currency schemes, embezzelement , environmental schemes . The punishment for these crimes should be recovery of all the money made by white collar crimes and to put the white collar criminals in prision ..