Am I ultimately alone? How many of us have asked that question--drunk or sober--when we've wondered if there was a God or when we've decided that there was none? And the universe reels around us, more vast than we could begin to comprehend and more apparently empty. But it's only when we overlook the fairly obvious fact that we are human beings on a planet packed with human beings that we can entertain the fairly self-indulgent idea that we are, in fact, alone.