Jane Elliot's 1968 'Blue Eyes, Brown Eyes' Experiment.

Well worth 15 minutes of your time.

"In response to the assassination of Martin Luther King, Jr. over thirty years ago, Jane Elliott devised the controversial and startling, "Blue Eyes/Brown Eyes" exercise. This, now famous, exercise labels participants as inferior or superior based solely upon the color of their eyes and exposes them to the experience of being a minority"