No single theory can fully explain racism and ethnocentrism.

Evidence

It is also apparent from years of research that many factors play an important role in the propagation of prejudiced beliefs and behavior. It should be clear, then, that no single theory can carry the burden of explaining and understanding the nature of racism and ethnocentrism. An integrative theoretical framework supported by empirical evidence is crucial for research on the nature of intergroup relations to progress. — Roderick M. Kramer, Geoffrey J. Leonardelli, Robert W. Livingston, Social Cognition, Social Identity, and…, 1277

Categorization

• APHORISMS: A caution against monotheoretic hubris in any complex behavioral domain, not just prejudice research.
• XREF: connects to: No single all-inclusive theory of environmental and ecological justice is required — David Schlosberg, Defining Environmental Justice:…, 44