" To justify such direct forms of imperialism and oppression, whites developed the IDEA of whiteness to define a privileged social category elevated above everyone who wasn't included in it. This made it possible to reconcile conquest, treachery, slavery, and genocide, with the nation's newly professed ideals of democracy, freedom, and human dignity. If whiteness define what it meant to be human, then it was seen as less off an offense against the Constitution (not to mention God) to dominate and oppress those who happened to fall outside that definition as the United States marched onward toward what was popularly perceived as its Manifest Destiny. "

― Allan G. Johnson , Privilege, Power, and Difference