THE PRINCIPLE OF MEDIOCRITY
By Alexander Vilenkin
"A striking consequence of the new picture of the world is that there should be an infinity of regions with histories absolutely identical to ours. That's right, scores of your duplicates are now reading copies of this article. They live on planets exactly like Earth, with all its mountains, cities, trees, and butterflies. There should also be regions where histories are somewhat different from ours, with all possible variations. For example, some readers will be pleased to know that there are infinitely many O-regions where Al Gore is the President of the United States.
"In this astonishing world view, our Earth and our civilization are anything but unique. Instead, countless identical civilizations are scattered across the infinite expanse of the cosmos. With humankind reduced to absolute cosmic insignificance, our descent from the center of the world, a process begun by Copernicus, is now complete."
ALEXANDER VILENKIN is Professor of Physics and Director of the Institute of Cosmology at Tufts University. He is the author of the Many Worlds in One: The Search for Other Universes.
http://www.edge.org/3rd_culture/vilenkin06/vilenkin06_index.html