That claim mixes together several different ideas—intelligence, identity, and group behavior—in a way that isn’t supported by evidence. It’s worth unpacking carefully.
First, IQ is a narrow and imperfect measure. It captures certain cognitive abilities (like pattern recognition and problem-solving under test conditions), but it does not measure wisdom, social understanding, values, or the reasons people form social bonds. Human behavior—especially something as complex as identity—is influenced by culture, history, environment, and psychology far more than by a single test score.
Second, forming groups based on shared identity is a universal human tendency, not something tied to “low” or “high” intelligence. People across all education and cognitive levels organize around:
- family and kinship
- language and culture
- nationality
- profession (academics, engineers, artists)
- ideology (political or religious groups)
In fact, highly educated or intellectually elite groups often form very strong in-groups—just based on different markers (e.g., institutions, credentials, or beliefs) rather than ethnicity.
Third, racial, ethnic, and national identities are especially powerful because they are visible, historically rooted, and socially reinforced. People may rely on them because:
- they provide a sense of belonging and security
- they are taught from childhood
- societies and institutions emphasize them
- in some contexts, they are tied to survival or political power
None of that requires low intelligence—it reflects human social psychology, especially what’s known as in-group/out-group bias. This bias appears in virtually all populations.
Fourth, research generally shows that higher cognitive ability is sometimes associated with more abstract or cosmopolitan thinking, but the effect is modest and context-dependent. It does not mean that “low IQ causes ethnic grouping” or that “high IQ prevents it.” Many highly intelligent people still strongly identify with nation, ethnicity, or race.
Finally, there’s an important caution:
Linking intelligence to race or ethnicity has a long history of misuse and has often been used to justify discrimination. Modern science treats such claims very carefully because human abilities vary far more within groups than between them, and social outcomes are heavily shaped by environment, opportunity, and inequality—not just individual traits.
A more accurate framing would be:
Humans—regardless of intelligence—tend to form groups. The type of group and how strongly someone identifies with it depends on culture, upbringing, incentives, and personal experience, not simply cognitive ability.







