We must expect for a long time yet to see capitalists still striving to obtain the highest possible profits. But observe, that the passion for wealth… - Arnold Toynbee

Economists, firstly, regard only one part of man's nature, and treat him simply as a money-making animal; secondly, they disregard the influence of custom, and only take account of competition. Certain laws are laid down under these assumptions; as, for instance, that the rate of wages always tends to an equality, the permanent difference obtaining in various employments being only sufficient to balance the favourable or unfavourable circumstances attending each of them — a law which is only true after a certain stage of civilisation and in so far as the acquisition of wealth is the sole object of men.

You must pursue facts for their own sake, but penetrated with a vivid sense of the problems of your own time. This is not a principle of perversion, but a principle of selection. You must have some principle of selection, and you could not have a better one than to pay special attention to the history of the social problems which are agitating the world now, for you may be sure that they are problems not of temporary but of lasting importance.

The right method in any particular case must be largely determined by the nature of the problem.