In the Multiverse, Are You Just a Brain?

The idea of there being multiple, parallel universes "out there" sounds pretty cool.  But does this really make sense?  Many atheists would say yes, perhaps because it helps to avoid the conclusion that God created our universe.  In particular, it looks like our universe is exquisitely designed for the existence of life.  But if we're one of many, many universes out there, then there's bound to be one like ours that can support life, right?

Well, yes, maybe, but as we'll see, punting to the multiverse proves too much.  In essence: if there are so many other worlds out there that can be appealed to in order to explain improbable events, then anything, no matter how crazy sounding, can happen.  In particular, it should lead you to believe that only you exist.

Did our universe come from the multiverse?

The multiverse theory (the idea that our universe is just one among many other universes out there) is an exceedingly popular idea among science fiction fans.  I mean, think of all the movies or star trek episodes that take advantage of multiple, parallel worlds? 

But the multiverse is also popular with atheists.  Why?  Even though there's no scientific evidence for it (and can never be), these champions of rationalism prefer the multiverse theory because it seems to solve two phenomena that are often attributed to God: the beginning of the universe and the fine tuning of the universe.

But does the multiverse really solve these problems?  (Hint: the answer is no.)