The only "out-there" theory type thing I have is my opinion on our existance, which probably wouldn't offend anyone, some people are just likely to strongly disagree, and I'm fine with that.
Basically I believe that humanity as a whole would benefit greatly by going back to a more instinctive, animal-like lifestyle. No more money, no more cars, no more houses, no more intelligence, just basic animalistic thought processes to ensure survival.
So instead of thinking "Oh I'm hungry, I wonder what I could possibly cook myself that will taste yummy and fill me up." We would think, "Hungry, find food, eat food."
I think that this way we'd resolve many things like world conflict, famine etc because we'd have no reason to fight any more (other than territorial conflict) and anywhere that there wasn't food we'd instinctively stay away from. It would also help to make humans as a whole stronger, because only the stronger people would survive this way of life, and would produce strong offspring. (Survival of the fittest etc)
Feel free to pick at this any way you will, I'm interested to hear other peoples opinions on my little idea.