I'm actually really into the free will discussion. Free will often ties into ethics in that almost always tied into it is the discussion of moral responsibility, but the ultimate question is still a metaphysical one: what exactly do we mean by free will and do we as human agents have it?
The two broad definitions I am familiar with are "alternative possibilities" and the compatibilist "unrestricted will".
I see in a later post you go with the first option of libertarian free will. I do not see how anything you write contradicts the notion of "alternative possibilities" or "ability to do otherwise". So long as the agent has the ability to will multiple options given a specific scenario, such that the outcome is caused by the agent freely, then I do not see how merely sharing space and having to take others into account for your actions eliminates free will.
I would agree that there are volumes on the subject, both secular and religious, that branch out to all aspects of possible scenarios of choice. But things like choosing what product to buy on the shelf isn’t of any value unless you are in marketing. Though even in that scenario, it is the store that makes the choice of what the choices within reach are, according to the distributer who makes the choice of what the store can have to sell, so on and so forth, and the consumer, (cattle), just thinks he has a choice in the matter.
Bottom line, the life one receives when one is born into the world, wasn’t chosen by the person receiving it, and one must live it or die. All living things on the planet have the same situation. That includes all that is within one's reach, has been chosen already, to be within one's reach. If there is another life to receive other than the human nature all of mankind receives, it would have to come from a higher power. Offered by the higher power at the higher power’s choosing, to whom ever He chooses to offer it.
Hence if one continue to eat and drink, one has agreed to live the life you have received, or die.
In the Christian context, when one receives the Life of Christ, if one eats thereof, hence one agrees to live the Life received or loss it. But these who received the Life (born of the Holy Spirit) are the elect, according to Peter and the prophets, so I don’t get where there are those who call themselves Christian say they choose God. Many are called few are chosen, is the understanding. And that would mean no one calls themselves, and no one chooses God, He calls us, He chooses us.
And to be clear there is a posting here using Josh 24:15, but what the poster failed to mention is, Josh 24:15 is being spoken to a people that have been chosen by the Lord their God since Abraham which is explained in the same chapter. I mention this, just in case you are buying that stuff.