It's no wonder you are so confused - because you think in such dualistic terms.
There is no history zero point, decisions, choices and responsibilities are ongoing with no start and end.
Choice proves determinism, as each choice is caused by the things brought to the decision process.
That's why Choice is critical, and it proves "Free-Will" as defined by the Free-Willists. Determinists seem to hang-up on this part.
The trouble with the "free will" ideas is that choices are determined by the conditions. Change the conditions and the choice is not the same.
What is it free from exactly??
So absurd.
Yes, necessity is another word for determined. Just a bit more thinking and you wull be there.
There is necessarily a moral character involved here. You have to "take control" of the Choice, its intended and unintended results.
That's funnier than you know.
Cause, and, you don't know the effects it will produce. Because people don't know (the future), this makes all Choice a matter of Risk. Real choices make you vulnerable. This is why there is a moral character involved, and why Determinism v Free-Will matters. It matters what you think, believe, do, about this.