Your Fate & Destiny, you have no control over.

maybe the incredible complexity allows both to exist.

Free will involves choices and decision, but at what point do the repercussions from those decisions die out, and another form of physics take hold?

For this one, i have seen the drastic changes one can make, freely, in ones perspective of their inevitable orbit towards death. In that, the free will is a choice towards perspective and its base, not necessarily "what is being perceived or observed through action."

If everything was preordained, life would have no meaning. I believe we choose/change our destiny with everything we do,