We may easily conceive that such an intercourse scarce required a more refined language than that of crows and monkeys, which flock together almost in the same manner. Inarticulate exclamations, a great many gestures, and some imitative sounds, must have been for a long time the universal language of mankind, and by joining to these in every country some articulate and conventional sounds, of which, as I have already hinted, it is not very easy to explain the institution, there arose particular languages, but rude, imperfect, and such nearly as are to be found at this day among several savage nations. My pen straightened by the rapidity of time, the abundance of things I have to say, and the almost insensible progress of the first improvements, flies like an arrow over numberless ages, for the slower the succession of events, the quicker I may allow myself to be in relating them. At length, these first improvements enabled man to improve at a greater rate. Industry grew perfect in proportion as the mind became more enlightened. Men soon ceasing to fall asleep under the first tree, or take shelter in the first cavern, lit upon some hard and sharp kinds of stone resembling spades or hatchets, and employed them to dig the ground, cut down trees, and with the branches build huts, which they afterwards bethought themselves of plastering over with clay or dirt. This was the epoch of a first revolution, which produced the establishment and distinction of families, and which introduced a species of property, and along with it perhaps a thousand quarrels and battles. As the strongest however were probably the first to make themselves cabins, which they knew they were able to defend, we may conclude that the weak found it much shorter and safer to imitate than to attempt to dislodge them: and as to those, who were already provided with cabins, no one could have any great temptation to seize upon that of his neighbour, not so much because it did not belong to him, as because it could be of no service to him; and as besides to make himself master of it, he must expose himself to a very sharp conflict with the present occupiers.