The Revolutionist's Handbook and Pocket Companion by George Bernard Shaw

Unfortunately the earnest people get drawn off the track of evolution by the illusion of progress. Any Socialist can convince us easily that the difference between Man as he is and Man as he might become, without further evolution, under millennial conditions of nutrition, environment, and training, is enormous. He can shew that inequality and iniquitous distribution of wealth and allotment of labor have arisen through an unscientific economic system, and that Man, faulty as he is, no more intended to establish any such ordered disorder than a moth intends to be burnt when it flies into a candle flame. He can shew that the difference between the grace and strength of the acrobat and the bent back of the rheumatic field laborer is a difference produced by conditions, not by nature. He can shew that many of the most detestable human vices are not radical, but are mere reactions of our institutions on our very virtues.

The Anarchist, the Fabian, the Salvationist, the Vegetarian, the doctor, the lawyer, the parson, the professor of ethics, the gymnast, the soldier, the sportsman, the inventor, the political program-maker, all have some prescription for bettering us; and almost all their remedies are physically possible and aimed at admitted evils. To them the limit of progress is, at worst, the completion of all the suggested reforms and the levelling up of all men to the point attained already by the most highly nourished and cultivated in mind and body.