In the macro sense it is the aggregate of individual free trade interactions where parties come together on a voluntary, mutual and consensual basis and make a willing exchange.
So logically in a micro sense, a free market interaction, supports peaceful exchange and voluntary human interactions on a more personal scale.
If it isn't a voluntary exchange, it isn't a free market thing which is happening. No doubt we've both made these kinds of exchanges, so it isn't "theoretical" or untried. Although, free market exchanges are prevented from occurring on a large scale by........wait for it........coercion based governments and their cronies.
You're welcome.