The explosion in productive energy which capitalism unleashed in the nineteenth century was accompanied by social evils and hardships which have since been outgrown and abolished. It has been possible to do so by means of that very increase in production itself, just as future social improvement will depend on the rate of our future economic advance. What tragic folly it would be if modern Britain were to cast away the subtlest and most efficient system mankind has yet devised for setting effort and resources to their best economic use, and were to go right back to the clumsy methods and crude fallacies which our forefathers thought they had left behind for ever.