Universe from Nothing 8: A Grand Accident? 138 'probability distribution' for four-dimensional universes embedded in a larger dimensional multiverse. One might find, for example, that the bulk of such universes that had small vacuum energy also had three families of elementary particles and four different forces. Or one might find that only in universes with small vacuum energy could there exist a long-range force of electromagnetism. Any such result might provide reasonably compelling evidence that a probabilistic anthropic explanation of the energy of empty space makes solid physical sense. Needless to say, such mathematical conditional probabilities have not resulted thus far. That does not mean they do not exist however. Nevertheless, in the meantime particle physics have taken anthropic reasoning a step further. Particle physicists are way ahead of cosmologists. Cosmology has produced one totally mysterious quantity: the energy of empty space, about which we understand virtually nothing. However, particle physics has not understood many more quantities for far longer! For example: Why are there three generations of elementary particles? Why is gravity so much weaker than the other forces in nature? Why is the proton 2000 times heavier than the elecdtron? And so on. Some particle physicists have now jumped on the anthropic bandwagon in the extreme. For perhaps not just one fundamental quantity in nature is an environmental accident. Maybe all of the mysteries of particle theory can be solved EFTA00603034