 According to their research, while culturally homogeneous groups experience little to no cultural conflict, as all the members share the same set of "conduct norms", culturally heterogeneous groups, such as modern industrial nations with large immigrant populations, display heightened competition between sets of cultural norms which, in turn, leads to an increase in violence and crime.Societies which have high levels of cultural diversity in their population, it is claimed, are more likely to have higher rates of violent crime.According to conflict theorists such as Marvin Wolfgang, Hubert Blalock and William Chambliss, the disproportionate representation of racial minorities in crime statistics and in the prison population is the result of race- and class-motivated disparities in arrests, prosecutions and sentencing rather than differences in actual participation in criminal activity, an approach which has also been taken by proponents of critical race theory.