Such a law is plainly a law impairing the natural obligation of their contracts.
Lysander Spooner
The Public Record
Lysander Spooner was an American abolitionist, entrepreneur, lawyer, essayist, natural rights legal theorist, pamphleteer, political philosopher, and writer often associated with the Boston anarchist tradition.
All State insolvent laws, so-called, that distribute a debtor's property equally among his creditors, are laws impairing the natural obligation of his contracts.
If the natural obligation of contracts were known, and recognized as law, we should have no need of insolvent or bankrupt laws.
The only force, function, or effect of a legal contract is to convey and bind rights of property.
When the mortgaged property is exhausted, the debt is cancelled; there is no other property that the contract binds.
If, therefore, a debtor, at the time his debt becomes due, pays to the extent of his ability, and has been guilty of no fraud, fault, or neglect, during the time his debt had to run, he is thenceforth discharged from all legal obligation.
They say this of all contracts, that are arbitrarily forbidden; although, naturally and intrinsically, they have as valid an obligation as any others that men ever enter into, or as any that courts enforce.
They hold that, if a State law forbids any contract to be made, such a contract can then have no obligation; and that, consequently, no State law can impair an obligation that never existed.
But this pretence, it will be seen, utterly discards the idea that contracts have any natural obligation.
It implies that contracts have no obligation, except the laws that are made for enforcing them.
But if contracts have no natural obligation, they have no obligation at all, that ought to be enforced; and the State is a mere usurper, tyrant, and robber, in passing any law to enforce them.
If the authority be vested in the government, the governmnt is absolute, and the people have no liberties except such as the government sees fit to indulge them with.