The concept that Marsiglia and Kulis are referring to from the statement mentioned in the question is a term called intersectionality.
Intersectionality is a concept that is generally defined as <em>a framework that acknowledges how an individual is impacted by various systems of power – and his or her position in each system, when combined would create a different experience in how an individual would be treated by the society at large. </em>
For example, an individual who identifies as Black, is female, has an upper middle class income, is heterosexual would navigate life differently from someone who is White, male, has a lower class income, and is homosexual.
