something I keep coming back to is the fact that coercion can be indirect, allowing someone to take advantage of you while claiming not to be coercive.
for example if your plane crashes and you are lost in the desert and I happen to be passing by I might offer you some water and a ride to the nearest town in exchange for all your worldly possessions or a lifetime of servitude or some other clearly unreasonable condition that is only being levied because I know you’re in a state where you cannot refuse.
and yet I’m not coercing you or constraining you, in fact I’m expanding the range of actions that you can choose from! before you had the choice of dying of thirst, now you have the choice of dying of thirst or becoming my slave in a voluntary trade that you enter into freely, a strictly superior situation.
this is closely related to the fresh water scenario, where I have purchased all the fresh water in your area to fill my pool, leaving you with none left to drink.
again, buying water is not coercion, nor is someone refusing to sell you water, and yet in a matter of hours or days you face death as humans require hydration in order to survive.
I could delay filling my pool in order to quench your thirst and in exchange I would merely ask for all of your yadda yadda yadda.
(the water scenario is more common than the lost in the desert scenario and affects far more people in the real world, given that dams exist, rivers are often diverted or polluted, and cities containing millions of people typically depend on water from reservoirs many miles away).
now it’s noteworthy that neither of these scenarios would be possible in the idealised world where the market is infinitely wide and infinitely deep and there is perfect information and transaction costs are zero etc.
if you were lost in the desert, finding you would be an opportunity for profit, and in an infinite perfect market the fee would be instantly bargained down to the cost it took to rescue you plus the smallest possible epsilon of profit.
if you lacked fresh water, that’s another opportunity for profit, and the infinite perfect market would swing into action and provide you with water at cost of delivery plus epsilon profit.
(you might still not be able to afford it, in which case the market takes no further interest in you, but at least if you could afford it you wouldn’t be getting gouged).
however the world we live in is not infinite, transaction costs are not zero, we don’t have perfect information, and the market can stay irrational longer than you can stay dehydrated (dying from an absence of liquidity, so to speak).
you can compensate for these problems by postulating additional entities: maybe you took out an insurance policy to cover plane crashes and interruptions to the water supply, maybe you have a mutual assistance agreement with many other people in your community who are obliged to help you out, maybe if taxes still exist in this world you have a basic income guarantee that automatically scales to cover the cost of a basket of necessities essential to life.
(famines caused by spikes in food prices or inflationary hoarding are also common, as again the human need for food must be satisfied on a shorter timescale than speculative bubbles and market irrationality).
there’s just no getting around the fact that physics is coercing all of us every day, and it’s easy to take advantage of that coercion of others and heighten it for your own advantage without technically throwing any punches or doing violence against them, so basing your society on the idea that violence is outlawed (a truly worthy thing!) is insufficient to deliver a world free from coercion.