At the core of left-wing thought is a rejection of painful realities, the rejection of what the French call les faits de la vie: the facts of life. Conservatives, on the other hand, are all too aware of these painful realities of life and base many of their positions on them. One such example was the subject of my first column on Left-Right differences: whether people are basically good. When liberals blame violent crime in America on poverty, one reason they do is that liberal beliefs since the Enlightenment have posited that human nature is good. Therefore, when people do...