Of course all sorts of other wastes will be avoided through the natural progress of discovery and the natural development of thought. Illness is a waste. Illness will be much less common in a hundred years' time. A man who eats and consumes the world's products without contributing to them will be too expensive a luxury for the new age to indulge itself with: and the present excuse for a "leisure" class--already scorned in America--that a rich and leisured class fosters and patronises the arts, will be absurd. All classes will foster and patronise the arts. For, just as we shall see that idleness is waste (and even more injurious to the idler than to his fellows), so we shall also see that overwork is a waste, because the legitimate purpose of human endeavour is not wealth, but happiness. When all work, all will be able to play. Planetary economy will be a determining factor in the change of diet which the coming century must inevitably witness. Such a wasteful food as animal flesh cannot survive: and even apart from the moral necessity which will compel mankind, for its own preservation, to abandon the use of alcohol, the direct and indirect wastefulness of alcohol will make it impossible for beverages containing it to be tolerated. Very likely tobacco will follow it. We are already in sight of legislation to restrain the use of tobacco by the young. It will probably be unnecessary for the law to prohibit its use by adults. The frugal adult of the new age will abandon it unbidden, the change taking place as smoothly and silently as the process from the universal drunkenness of our great-grandfathers to the relative sobriety of ourselves, a process of which it is surprising that anyone can fail to perceive that the natural end must be the total disuse of alcoholic drinks. All things work their way to their natural conclusion, and there is no more fertile source of sociological blindness than the fallacy which treats certain phenomena of society as static, whereas all phenomena of society are really in the dynamic state, and always must be so.