We are faced then with a community or household which has certain wants that need to be supplied. The individual members of the community are justified, within the limits of general well-being,[67] in deciding what are their own wants and how to satisfy them. They claim the right to _demand_, as the economists put it, the goods and services they require, bread and cheese, poetry, tobacco, motor-bicycles, china ornaments. In order to meet those demands, which are stable in essentials but subject to constant modification in detail, there is ceaseless activity, rivalry, competition, on the part of the purveyors--on the side of what economists call _supply_. The business of housekeeping, or what is called the economic process, is that of bringing this demand and this supply into relation with one another. If the members of the household said they wanted to eat the moon instead of sugar, their demand would not be an economic demand: for no housekeeper could satisfy it. Similarly on the supply side: if the baker insisted on bringing round bad epics instead of bread and the grocer bad sonatas instead of sugar, the supply, however good it might seem to the baker and the grocer, and however much satisfaction they might personally have derived from their work, would not be an economic supply: for the housekeeper, acting on behalf of the household, would not take it in. But if the demand was for something not yet available, but less impossibly remote than the moon, the housekeeper might persuade the purveyors to cudgel their brains till they had met the need. For, as we know, Necessity, which is another word for Demand, is the mother of invention. Similarly, if a purveyor supplied something undreamed of by the household, but otherwise good of its kind, he might succeed in persuading the household to like it--in other words, in creating a demand. The late Sir Alfred Jones, by putting bananas cheap on the market, persuaded us that we liked them. Similarly Mr. Marvin, who deals in something better than bananas, has persuaded us all to come here, though most of us would never have thought of it unless he had created the demand in us.