Bacteria haven't been here since the formation of the earth ...have they?
Sorry, once again I've not used exactly the correct terms - my fault - always kick myself when I do it.
Single cell life was believed to be the first form of life on earth and that includes bacteria.
Wickipedia says: Single-cell microorganisms were the first forms of life to develop on Earth, approximately 3–4 billion years ago. Further evolution was slow, and for about 3 billion years in the Precambrian eon, all organisms were microscopic. So, for most of the history of life on Earth the only forms of life were microorganisms.
So, I'm off by some billions of years, but still, I think the argument stands. Single cell life is the most "fit for survival", although they do "horizontally" evolve - and quite well, I believe. Still can't see why they would evolve to a higher level of complexity, since they have done quite well, better than any other form of life, just as they are.
I'd like to thank everyone for their polite replies. Not only do I enjoy this, I spend a lot of time attempting to figure out a "belief system" that makes solid sense to me. Another very interesting subject - all belief/truth is relative to the individual. If it wasn't at some point in IQ, Education, Experience - everyone would believe the very same thing and yet we don't see that. Sorry - I digress. Have a great day -Scott