In the personal realm, most Americans are thoughtful, caring, generous. We try to do our best by family and friends. At times we'll even stop to help another driver stranded with a roadside breakdown, or to give some spare change to a stranger. But increasingly, a wall now separates each of us from the world outside, and from others who've likewise taken refuge in their own private sanctuaries. We've all but forgotten how much public participation is the very soul of democratic citizenship, and how much it can enrich our lives.