I use the established scientific definition of theory, which means that it is the best explanation of a large body of facts determined experimentally that not only explains the known facts, but can predict others. If you are interested in the facts which led to the development and refinement of the theory of evolution, may I suggest a google search, because there is too large a body of knowledge for me to post here. The lay person's definition of "theory" does not apply here; the scientific equivalent is "supposition." BTW, I don't know what "outcome" "my" theory supposedly leads to; an explanation of the world says nothing about morality, the future, spirituality, good, evil, or anything else other than the nature of the world.
Why is it so difficult to communicate? Do "scientists" corner the market on understanding ideas? Or, must they have the proper indoctrination to understand? Just a simple question. I am sure you are not implying that you are smart and the rest of us are stupid. That would just be plain rude. :)
It's difficult to communicate because I have spent something like 8 years studying the subject, and 6 years doing lab research in the field. No indoctrination, just a thorough understanding of intracellular processes, DNA/protein/lipid chemistry, etc. Unless you have also spent an ungainly amount of time studying the same subjects I have, you do not have the knowledge necessary to understand. No more than you would understand me if I started writing in French right now (unless you have also studied it and speak it fluently). So my choices are either to simplify (which can cause my explanation to be inaccurate even if technically correct) or to define each term as I go along (which, after the second or third definition, will cause your eyes to irrevocably glaze over). I am a firm believer that any idea in science should be communicable in at least a simplified form; it's just difficult to simplify adequately.