Transcript: The anthropic principle can be connected to modern cosmological theories in a fascinating way. In current big bang theories, the universe had a quantum genesis. It emerged from a tiny seed of space-time, much smaller than the nucleus of an atom. This was called the Planck era, when the four forces of nature melted together. The birth of the universe was a quantum fluctuation event that led to a rapid expansion and inflation to the universe as large and old as we see now. Hypothetically, out of this original quantum state other universes could have been created and then maybe even destroyed. Some universes may have been long lived like ours and filled with matter and radiation. Others may have been temporary and evanescent. Some may have had radiation but no matter. Others may have had equal amounts of matter and antimatter. Others could have had the forces of nature different. Still others could have had such a value of entropy as to lead to no arrow of time. This panoply of possible universes is called the multiverse, and in this version of hypothetical quantum creation, only a small fraction of these universes would have had the properties suitable for life to evolve. In this sense, we do live in the best of all possible worlds.