Many biological concepts are of great relevance to politics, but the Competitive Exclusion Principle — which is tragically ignored by most on the "bio-realist" right — has particular relevance to modern racial politics.

In brief: Two populations with sufficiently overlapping requirements for the same limited resource(s) cannot coexist indefinitely at constant population sizes within the same niche. When one population has a consistent competitive advantage, it will eventually displace the other, potentially leading to extinction, migration, or a behavioral shift toward a different ecological niche.

The 'loser' is displaced via a variety of mechanisms: resource depletion, reduced environmental carrying capacity (caused by population growth), physical aggression, territorial exclusion, etc.

This rule applies to species, subspecies (including human races), and even lower taxonomic designations like strains or morphs (for example, members of the same subspecies that exhibit different color patterns).