Walkate argues that criminology is a flexible subject because its possible to approach it for different prespectives. For one thing, law varies from place to place and over time. This is as much and advantage for us as it is a disadvantage though. The limitations occur when we try to find a broader common ground between modern and ancient ideas. The legal approach to criminology has questions like extent to which ancient and modern cultures conceive the category of crime and nature of criminals independently of specific laws. This approach defines crime as what is morally wrong and that may or may not be against specific laws. So if cross the street even when the little red hand is on, this is law breaking behavious- not morally wrong. This one is like moral approach but emphasizes the social nature of the category of crime. In ancient greek, the word for laws is nomos which also means customs.