How Things Become Money — Das Kapital

Commodities cannot walk to market on their own. They need owners who recognise one another as private proprietors and exchange by mutual consent. Marx stresses that contracts and legal relations are not the foundation of trade but the reflex of an economic relation already in motion.

Every seller faces a double requirement. A commodity must prove itself a use-value to someone else before it can realise its value, yet it must also be treated as value before the useful exchange can occur. Owners act first and theorise later, instinctively comparing goods until one commodity is socially singled out as the universal equivalent.

Money crystallises from practice, not from a planner's decree. The chapter ends with gold and silver. Their durability and divisibility make them fit bearers of value, but the deeper point is social. Money looks like a thing with inner power, yet it is a relation between commodity owners that has hardened into metal. Once that form feels natural, the magic is hard to unsee.