Barack Obama speaks in Philadelphia, PA at Constitution Center, on matters not just of race and recent remarks but of the fundamental path by which America can work together to pursue a better future.

Arguing against the biological interpretation of racial difference, Hall asks us to pay close attention to the cultural processes by which the visible differences of appearance come to stand for natural or biological properties of human beings. Drawing upon the work of writers such as Frantz Fanon, he shows how race is a "discursive construct" and, because its meaning is never fixed, can be described as a "floating signifier."