As a consequence, democracy can be interpreted to assert not only equality before the law but also essentialistic identity in all respects. This is expressed in the claim, “All men are created equal,” which is something very different from the statement, “All men have equal rights and are equal before the law.” Anyone who believes in the genetic uniqueness of every individual thereby believes in the conclusion, “No two individuals are created equal.”
The Growth of Biological Thought: Diversity, Evolution, and Inheritance
by Ernst Mayr
* When Thomas Jefferson proclaimed that “all men are created equal,” he failed to distinguish between the civil equality of individual human beings and their biological uniqueness. Even though all of us are in principle equal before the law and ought to enjoy an equality of opportunity, we may be very different in our preferences and aptitudes. And if this is ignored, it may well lead to discord.
* It is our obligation to overcome the seeming conflict between a strict upholding of civil equality and the vast biological and cultural differences among individual human beings and groups of individuals. The introduction of new educational measures and even legislation to overcome existing inequalities will be successful only if based on a full understanding of the underlying biological and cultural factors.