These regulations ought to prevent the competition between the industrious freemen and the masters of slaves, by appropriating the occupation of each to different objects: to confine slavery, for example, to the country; that is, to set the slaves apart for agriculture, and to exclude them from every other service of work. With such a regulation _perhaps_ industry might succeed. This was not the case of old; industry did not succeed as at present: and to this I attribute the simplicity of those times. It is not so difficult to introduce slavery into a state where liberty is established; because such a revolution might be brought about by force and violence, which make every thing give way; and, for the reasons above-mentioned, I must conclude, that the consequences of such a revolution would tend to extinguish, or at least, without the greatest precaution, greatly check the progress of industry: but were such precautions properly taken; were slavery reduced to a temporary and conditional service, and put under proper regulations; it might prove, of all others, the most excellent expedient for rendering the lower classes of a people happy and flourishing; and for preventing that vitious procreation, from which the great misery to which they are exposed at present chiefly proceeds. But as every modification of slavery is quite contrary to the spirit of modern times, I shall carry such speculations no farther. Thus much I have thought it necessary to observe, only by the way, for the sake of some principles which I shall have occasion afterwards to apply to our own oeconomy; for wherever any notable advantage is found accompanying slavery, it is the duty of a modern statesman to fall upon a method of profiting by it, without wounding the spirit of European liberty. And this he may accomplish in a thousand ways, by the aid of good laws, calculated to cut off from the lower classes of a people any interest they can have in involving themselves in want and misery, opening to them at the same time an easy progress towards prosperity and ease. Here follows an exposition of the principles, from which I was led to say, in a former chapter, that the failure of the slavish form of feudal government, and the extension thereby given to civil and domestic liberty, were the source from which the whole system of modern polity has sprung. Under the feudal form, the higher classes were perhaps more free than at present, but the lower classes were either slaves, or under a most servile dependence, which is entirely the same thing as to the consequence of interrupting the progress of private industry.