It is important to be clear at the outset that economic or industrial history _is_ a tributary stream and not the main stream: for there are a number of people who are of the contrary opinion. There has been an increasing tendency of recent years to write human history in terms of economic or industrial progress. 'Tell me what men ate or wore or manufactured,' say historians of this school, 'and we will tell you what stage of civilization he had reached. We will place him in his proper pigeonhole in our arrangement of the record of human progress.' Did he use flint implements or fight with nothing but a bow and arrow? Did he use a canoe with a primitive pole which he had not even the sense to flatten so as to make it into a serviceable paddle? Then our sociologist will put him very low down on his list of the stages of human progress. For the modern sociologist is a confirmed plutocrat. He measures the character of men and races by their wealth. Just as old-fashioned people still think of the society of our own country as a hierarchy, in which the various classes are graded according to their social prestige and the extent of their possessions: so students of primitive civilization classify races according to their material equipment, and can hardly help yielding to the temptation of reckoning their stage of progress as a whole by the only available test. Thus it is common, especially in Germany and the United States, to find histories of what purports to be the progress of mankind which show man first as a hunter and a fisherman, then as a shepherd, then as a tiller of the soil, and then work upwards to the complicated industrial system of to-day. We are asked to accept the life of Abraham or David among the sheepfolds as the bottom of the ladder, and the life of a modern wage-earner under the smoky sky of a manufacturing area as the top; and when we complain and say, as men like William Morris and Stephen Graham are always saying, that we would far prefer to live in David's world, in spite of all its discomforts, we are told that we have no right to quarrel with the sacred principle of Evolution.