First, we may observe that the ancient republics were almost in perpetual war, a natural effect of their martial spirit, their love of liberty, their mutual emulation, and that hatred which generally prevails among nations that live in a close neighbourhood. Now, war in a small state is much more destructive than in a great one, both because all the inhabitants in the former case must serve in the armies, and because the state is all frontier and all exposed to the inroads of the enemy.
The maxims of ancient war were much more destructive than those of modern, chiefly by the distribution of plunder, in which the soldiers were indulged. The private men in our armies are such a low set of people that we find any abundance beyond their simple pay breeds confusion and disorder, and a total dissolution of discipline. The very wretchedness and meanness of those who fill the modern armies render them less destructive to the countries which they invade; one instance, among many, of the deceitfulness of first appearances in all political reasonings.57
Ancient battles were much more bloody by the very nature of the weapons