Fifty percent of Americans can name four characters from ''The Simpsons,'' but only two out of five can name all three branches of the federal government. No more than one in seven can find Iraq on a map. Just how stupid are we? Pretty stupid. In Just How Stupid Are We?, best-selling author Rick Shenkman takes aim at our great national piety; the wisdom of the American people. American democracy is as direct as it's ever been - but voters are misusing, abusing, and abdicating their political power. At once a powerful indictment of voter apathy and political indifference, Just How Stupid Are We? also provides concrete proposals for reforming our institutions - the government, the media, civic organizations, political parties - to make them work better for the American people. But first, Shenkman argues, we must reform ourselves.