It results from these general facts in respect to the distribution of the supplies of animal and vegetable food for man in different latitudes that, in all northern climes in our hemisphere, men living in a savage state must be hunters, while those that live near the equator must depend for their subsistence on fruits and roots growing wild. When, moreover, any tribe or race of men in either of these localities take the first steps toward civilization, they begin, in the one case, by taming animals, and rearing them in flocks and herds; and, in the other case, by saving the seeds of food-producing plants, and cultivating them by artificial tillage in inclosed and private fields. This last is the condition of all the half-civilized tribes of the tropical regions of the earth, whereas the former prevails in all the northern temperate and arctic regions, as far to the northward as domesticated animals can live. From time immemorial, the whole interior of the continent of Asia has been inhabited by tribes and nations that have taken this one step in the advance toward civilization, but have gone no farther. They live, not, like the Indians in North America, by hunting wild beasts, but by rearing and pasturing flocks and herds of animals that they have tamed. These animals feed, of course, on grass and herbage; and, as grass and herbage can only grow on open ground, the forests have gradually disappeared, and the country has for ages consisted of great grassy plains, or of smooth hill-sides covered with verdure. Over these plains, or along the river valleys, wander the different tribes of which these pastoral nations are composed, living in tents, or in frail huts almost equally movable, and driving their flocks and herds before them from one pasture-ground to another, according as the condition of the grass, or that of the springs and streams of water, may require. We obtain a pretty distinct idea of the nature of this pastoral life, and of the manners and customs, and the domestic constitution to which it gives rise, in the accounts given us in the Old Testament of Abraham and Lot, and of their wanderings with their flocks and herds over the country lying between the Euphrates and the Mediterranean Sea. They lived in tents, in order that they might remove their habitations the more easily from place to place in following their flocks and herds to different pasture-grounds. Their wealth consisted almost wholly in these flocks and herds, the land being almost every where common. Sometimes, when two parties traveling together came to a fertile and well-watered district, their herdsmen and followers were disposed to contend for the privilege of feeding their flocks upon it, and the contention would often lead to a quarrel and combat, if it had not been settled by an amicable agreement on the part of the chieftains. [Illustration: ENCAMPMENT OF A PATRIARCH.]