But that doesn't spell it out.
* What is "institutionalized oppression"? According to the Stanford Encyclopedia of Philosophy:
"Structural discrimination—sometimes called “institutional” (Ture and Hamilton 1992/1967: 4)—should be distinguished from organizational: the structural form concerns the rules that constitute and regulate the major sectors of life such as family relations, property ownership and exchange, political powers and responsibilities, and so on. (Pogge 2008: 37) It is true that when such rules are discriminatory, they are often—though not always—the deliberate product of some collective or individual agent, such as a legislative body or executive official. In such cases, the agents are guilty of direct discrimination. But the idea of structural discrimination is an effort to capture a wrong distinct from direct discrimination. Thus, Fred Pincus writes that “[t]he key element in structural discrimination is not the intent but the effect of keeping minority groups in a subordinate position” (1994: 84). What Pincus and others have in mind can be explained in the following way."
I'm not sure how a fantasy world fits into institutional discrimination. Can you explain it? Maybe you're working with a different definition from a better informed source than Stanford University.