Political scientist Edward Erler proclaims in the latest issue of Hillsdale College’s Imprimis that unbridled pleas for diversity can harm the American constitutional system.

Historically, constitutional government has been found only in the nation-state, where the people share a common good and are dedicated to the same principles and purposes. The homogeneous world-state—the European Union on a global scale—will not be a constitutional democracy; it will be the administration of “universal personhood” without the inconvenience of having to rely on the consent of the governed. It will be government by unelected and unaccountable bureaucrats, much like the burgeoning administrative state that is today expanding its reach and magnifying its power in the United States. “Universal persons” will not be citizens; they will be clients or subjects. Rights will be superfluous because the collective welfare of the community—determined by the bureaucrats—will have superseded the rights of individuals.

Progressive liberalism no longer views self-preservation as a rational goal of the nation-state. Rather, it insists that self-preservation and national security must be subordinate to openness and diversity. America’s immigration policies, we are told, should demonstrate our commitment to diversity because an important part of the American character is openness, and our commitment to diversity is an affirmation of “who we are as Americans.” If this carries a risk to our security, it is a small price to pay. Indeed, the willing assumption of risk adds authenticity to our commitment.

In support of all this, we are asked to believe something incredible: that the American character is defined only by its unlimited acceptance of diversity. A defined American character—devotion to republican principles, republican virtue, the habits and manners of free citizens, self-reliance—would in that case be impermissibly exclusive, and thus impermissibly American.