The advantage of pure, and the disadvantage of impure air are experienced each time we breathe, and all who understand the causes of disease know that an impure atmosphere is most unfavourable to the enjoyment of health, and an efficient cause to shorten human existence within the natural life of man. It is therefore most desirable that decisive measures should be devised and generally adopted to ensure to all a pure atmosphere, in which to live during their lives.
To create an unfavourable impression, it is not necessary that certain things should be true, but that they have been said.william hazlitt
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.Arnold Toynbee