Discrimination in this context refers to the arbitrary denial of rights, privileges, and opportunities to members of these groups. Discrimination is an action or practice that excludes, disadvantages, or merely differentiates between individuals or groups of individualsMore specifically, Hunter investigates colorism, or how people of color experience discrimination according to the lightness or darkness of their skin tone. Discrimination is the unfair or prejudicial treatment of people and groups based on characteristics such as race, gender, age, or sexual orientation. Racism is discrimination and prejudice against people based on their race or ethnicity. Racism can be present in social actions, practices, or political systems Margaret "Maggie" Hunter specializes in research on race and gender discrimination. More specifically, Hunter investigates colorism. Discrimination is an action or practice that excludes, disadvantages, or merely differentiates between individuals or groups of individuals Racism is discrimination and prejudice against people based on their race or ethnicity.