But blame is not the answer.
In the modern America we should beware not of the explicit prejudgment (although it certainly exists as well), but of assumptions that are hiding under the surface of our own consciousness. They are called implicit biases. It turns out that we all have them, whether we want it or not. Because of these biases we often contribute to social flaws even when we are actively trying to make them go away.
This video explains how each of us can learn about our implicit biases. We can learn about them by taking an ingenious Implicit Association Test created by Harvard scholars. The test is free and fun to take. The video describes how the test works, and talks about the importance of acknowledging our own implicit biases for making the world a better place.