Reading The Origins of Capitalism again, and something else obvious occurred to me: The meaninglessness of contracts under capitalism.
What do I mean by that? In Part I Section 2, Marxist Debates, Meiksins Wood discusses Marx's definition of 'capital' as a social-relation(ie: that it isn't just wealth, but wealth deployed to create more wealth through the labor of others), and specifically how it drove competition in the example of "scientific agriculture" in the English countryside during and after the period of Enclosure, to wit:
landlords raise their rents to driveout the old holders(realistically this was a MUCH more coercive and violent process than merely rent-increases, and it was a big change for other reasons I'll get to at the end)
then sell the land to agricultural-capitalists who can pay those rents.
Then continue to raise the rents on those capitalists, in response to their yearly production; the better the tenants do, the more the rent goes up.
This forces the agricapitalists to constantly reinvest(and "reduce costs" by cutting corners and abusing their laborers) to continue covering their rents
and forces them into competition with EACH-OTHER(in any method they can think of) as one farmer doing better will raise rates for EVERYONE, and eventually lead to the landlord selling THEIR land out from under them to those better performing
So what does this have to do with contracts?
In the feudal period, your contract was unassailable. Sure: the local lord could come and take your stuff by force if they wanted and waving the contract around wasn't going to stop them, but if you survived, and kept the contract intact, and made it to a royal or circuit court, you could prove your ownership and that you hadn't violated the terms, and you'd likely receive compensation if not complete restitution, AND the lord would be punished for harming his tenants(since the only thing nobles loved more that stepping on their tenants was stepping on each other).
In practice, trying to expropriate your tenants was so troublesome that lords tended to just honor their agreements. A Freeholder and their descendants would stay forever freeholders(excepting a violation in terms, for instance refusing feudal service), a leaseholder would live secure in their land until their lease's term expired, if you held your land for life your lord could not take it from your family until you died(and often "for-life" contracts would stipulate terms of renewal), if you paid rent for your land that rent COULD NOT BE Renegotiated for the term of the title; even a Serf or a Ward was guaranteed 1)a place to live 2)land to generate food from and 3)food to survive on when either that land, or their bodies, could not produce said food, under their, essentially, slavery-contracts.
In the feudal period contracts could only be legally renegotiated when their terms expired, or on holder-violations, and a lord who violated those contracts ran big risks: from their tenants who could rightfully resist such violations, from their peers always looking to expand their holdings, from their overlords(ditto, and always strapped for cash), and from The Church since IT, along with overlords, guaranteed contracts.
Under capitalism Renthold was powerfully favored over other forms of landholding and your rent- or lease-contract, then as now, could be "renegotiated" whenever the hell your landlord wanted, your consent and knowledge unnecessary. "The Sanctity of Contract" is supposedly one of the pillars of capitalist society, but the reality is that rentiers VIOLATING their contracts constantly is a central mechanism of it.