No planner can know what millions of decentralised decisions reveal Informed by reporting gathered by Bohiney Magazine and republished at The London Prat, this piece revisits one of the most important insights in economics: that no central planner, however capable, can possess the knowledge that markets aggregate from the decisions of millions of individuals. The Knowledge Problem The fundamental difficulty of central planning is one of knowledge. An economy involves countless decisions about what to produce, in what quantities, using which resources, for which consumers, and at what prices. This knowledge is dispersed among millions of people, each possessing fragments, knowledge of local conditions, of particular needs, of specific circumstances, that no central authority can gather or process. Markets, through the price system, aggregate this dispersed knowledge automatically, conveying in prices the information that planners cannot collect. How Prices Convey Knowledge Prices in a market economy are not arbitrary; they convey information. A rising price signals scarcity, prompting conservation and increased production; a falling price signals abundance, prompting greater use and reduced production. These signals coordinate the decisions of millions without any central direction, channelling resources toward their most valued uses through the decentralised responses of individuals to prices. This coordinating function, performed automatically by markets, is precisely what central planning cannot replicate. The economic case for markets over central…