"What i'm looking for here is reason." I GAVE you a reason! "You say some developed spines, for what reason?" Lots of advantages to spines: swimming better, protection for central nervous system, having hard structure without the limitations of an exoskeleton, lots! "Why was a spine preferred among fish that had no need for a spine to survive." It wasn't. It resulted in both fish with spines and sea life without spines.

Mutations have lots of causes, from radiation to viruses free radicals to all sorts of other things.

Observable, like the WMAP data showing the universe to be 75% dark energy? Yes, that points to a Big Rip some googol years from now. But I guess it's a lot easier to hold on to pathetic delusions if you immediately laugh at anything new you're presented with. So much more comforting to a bloated ego than admitting that you're wrong and you don't know everything...

"This is backward thinking." No, it's the way it happened. "You're only saying sexual reproduction would help evolution but it doesn't do any good if creatures had no reason to evolve." EVERY creature has reason to evolve! And the better they can evolve, the better they can survive! "In other words if humans were asexual we wouldn't know that sexual reproduction would advance evolution. We would have no concept of sex." IT'S NOT ABOUT WHAT WE KNOW!!! GET THAT THROUGH YOUR THICK HEAD!!!

"They wouldn't know about things outside the water." You cannot POSSIBLY be this stupid! What, do you think evolution is somehow based on what they KNOW, like they do it on purpose or something??? Evolution DOESN'T WORK THAT WAY. The resources were there. The species that happened upon a way of getting there were better able to survive. Hence, they survived.