So glad someone asked for pet theories. Mine's a doozy, especially since I'm no scientist, and my eyes glaze at the mention of quantum fluctuations and the like.
Now, I must preface that my theory is inspired by something I believe Mr. Hawking said, to wit, that no information can pass through a singularity, ergo, that which happened at T<=0, if anything, is forever lost to us. If I understand this correctly, it is an open invitation to speculate - and there's not a thing anyone can say against my speculations!
OK. I propose that there is a realm outside of space-time. A higher-order realm, if you will. Perhaps its the "area" into which space is expanding. (Don't hit that reply button yet). It may have a separate timeline, or time may be meaningless there. If it does have a timeline, then being outside of our space-time, and thus not subject to the "rules" of causality, it is conceivable that this realm has no "beginning" and no "end."
I further propose that there are one or more "things" in this realm, the function of which is simply to create universes - or perhaps universe-creation is a by-product of some other function. No intent, no design, just every once in a while, this thing burps out a universe. Don't ask me how it happens, after all, it's not something that is subject to detailed analysis...the point is that, if I understand Hawking correctly, no one can say otherwise.
Now the theists here are thinking, OK, the realm is heaven, and the universe-burper-outer is God. But notice, I said there was no intent, no design. The Universe-creator-thingy does not
have to be sentient. It's just a "thing" out there in that "realm" that happens to do this. I guess this is somewhat akin to Aristotle's Prime Mover.
The advantages I see to my theory are, one, it bypasses the problem of First Cause, and two, energy is conserved, since energy may exist in a different form in the outer realm, and is translated through the singularity to become the stuff of our universe.
Please tell me if I am off-base here. And please, if anyone can demonstrate, in light of this possible scenario, why universe-creation has to be a willful act, I'm all ears.
==JJS==