 This line of argumentation is generally seen as part of a wider approach to race-related issues referred to as the Discrimination Thesis, which assumes that differences in the treatment received by people of minority racial background in a number of public institutions, including the criminal justice, education and health care systems, is the result of overt racial discrimination.Opposed to this view is the Non-Discrimination Thesis, which seeks to defend these institutions from such accusations.At the time it was first proposed, conflict theory was considered outside the mainstream of more established criminological theories, such as strain theory, social disorganization theory and differential association theory.