An Inquiry Into the Nature and Causes of the Wealth of Nations

In a more advanced state of society, two different causes contribute to render it altogether impossible that they who take the field should maintain themselves at their own expense. Those two causes are, the progress of manufactures, and the improvement in the art of war.

Though a husbandman should be employed in an expedition, provided it begins after seed-time, and ends before harvest, the interruption of his business will not always occasion any considerable diminution of his revenue. Without the intervention of his labour, Nature does herself the greater part of the work which remains to be done. But the moment that an artificer, a smith, a carpenter, or a weaver, for example, quits his workhouse, the sole source of his revenue is completely dried up. Nature does nothing for him; he does all for himself. When he takes the field, therefore, in defence of the public, as he has no revenue to maintain himself, he must necessarily be maintained by the public. But in a country, of which a great part of the inhabitants are artificers and manufacturers, a great part the people who go to war must be drawn from those classes, and must, therefore, be maintained by the public as long as they are employed in its service.

When the art of war, too, has gradually grown up to be a very intricate and complicated science; when the event of war ceases to be determined, as in the first ages of society, by a single irregular skirmish or battle; but when the contest is generally spun out through several different campaigns, each of which lasts during the greater part of the year; it becomes universally necessary that the public should maintain those who serve the public in war, at least while they are employed in that service. Whatever, in time of peace, might be the ordinary occupation of those who go to war, so very tedious and expensive a service would otherwise be by far too heavy a burden upon them. After the second Persian war, accordingly, the armies of Athens seem to have been generally composed of mercenary troops, consisting, indeed, partly of citizens, but partly, too, of foreigners; and all of them equally hired and paid at the expense of the state. From the time of the siege of Veii, the armies of Rome received pay for their service during the time which they remained in the field. Under the feudal governments, the military service, both of the great lords, and of their immediate dependents, was, after a certain period, universally exchanged for a payment in money, which was employed to maintain those who served in their stead.

The number of those who can go to war, in proportion to the whole number of the people, is necessarily much smaller in a civilized than in a rude state of society. In a civilized society, as the soldiers are maintained altogether by the labour of those who are not soldiers, the number of the former can never exceed what the latter can maintain, over and above maintaining, in a manner suitable to their respective stations, both themselves and the other officers of government and law, whom they are obliged to maintain. In the little agrarian states of ancient Greece, a fourth or a fifth part of the whole body of the people considered themselves as soldiers, and would sometimes, it is said, take the field. Among the civilized nations of modern Europe, it is commonly computed, that not more than the one hundredth part of the inhabitants of any country can be employed as soldiers, without ruin to the country which pays the expense of their service.

The expense of preparing the army for the field seems not to have become considerable in any nation, till long after that of maintaining it in the field had devolved entirely upon the sovereign or commonwealth. In all the different republics of ancient Greece, to learn his military exercises, was a necessary part of education imposed by the state upon every free citizen. In every city there seems to have been a public field, in which, under the protection of the public magistrate, the young people were taught their different exercises by different masters. In this very simple institution consisted the whole expense which any Grecian state seems ever to have been at, in preparing its citizens for war. In ancient Rome, the exercises of the Campus Martius answered the same purpose with those of the Gymnasium in ancient Greece. Under the feudal governments, the many public ordinances, that the citizens of every district should practise archery, as well as several other military exercises, were intended for promoting the same purpose, but do not seem to have promoted it so well. Either from want of interest in the officers entrusted with the execution of those ordinances, or from some other cause, they appear to have been universally neglected; and in the progress of all those governments, military exercises seem to have gone gradually into disuse among the great body of the people.

In the republic of ancient Greece and Rome, during the whole period of their existence, and under the feudal governments, for a considerable time after their first establishment, the trade of a soldier was not a separate, distinct trade, which constituted the sole or principal occupation of a particular class of citizens; every subject of the state, whatever might be the ordinary trade or occupation by which he gained his livelihood, considered himself, upon all ordinary occasions, as fit likewise to exercise the trade of a soldier, and, upon many extraordinary occasions, as bound to exercise it.

The art of war, however, as it is certainly the noblest of all arts, so, in the progress of improvement, it necessarily becomes one of most complicated among them. The state of the mechanical, as well as some other arts, with which it is necessarily connected, determines the degree of perfection to which it is capable of being carried at any particular time. But in order to carry it to this degree of perfection, it is necessary that it should become the sole or principal occupation of a particular class of citizens; and the division of labour is as necessary for the improvement of this, as of every other art. Into other arts, the division of labour is naturally introduced by the prudence of individuals, who find that they promote their private interest better by confining themselves to a particular trade, than by exercising a great number. But it is the wisdom of the state only, which can render the trade of a soldier a particular trade, separate and distinct from all others. A private citizen, who, in time of profound peace, and without any particular encouragement from the public, should spend the greater part of his time in military exercises, might, no doubt, both improve himself very much in them, and amuse himself very well; but he certainly would not promote his own interest. It is the wisdom of the state only, which can render it for his interest to give up the greater part of his time to this peculiar occupation; and states have not always had this wisdom, even when their circumstances had become such, that the preservation of their existence required that they should have it.

A shepherd has a great deal of leisure; a husbandman, in the rude state of husbandry, has some; an artificer or manufacturer has none at all. The first may, without any loss, employ a great deal of his time in martial exercises; the second may employ some part of it; but the last cannot employ a single hour in them without some loss, and his attention to his own interest naturally leads him to neglect them altogether. Those improvements in husbandry, too, which the progress of arts and manufacturers necessarily introduces, leave the husbandman as little leisure as the artificer. Military exercises come to be as much neglected by the inhabitants of the country as by those of the town, and the great body of the people becomes altogether unwarlike. That wealth, at the same time, which always follows the improvements of agriculture and manufactures, and which, in reality, is no more than the accumulated produce of those improvements, provokes the invasion of all their neighbours. An industrious, and, upon that account, a wealthy nation, is of all nations the most likely to be attacked; and unless the states takes some new measure for the public defence, the natural habits of the people render them altogether incapable of defending themselves.

In these circumstances, there seem to be but two methods by which the state can make any tolerable provision for the public defence.

If may either, first, by means of a very rigorous police, and in spite of the whole bent of the interest, genius, and inclinations of the people, enforce the practice of military exercises, and oblige either all the citizens of the military age, or a certain number of them, to join in some measure the trade of a soldier to whatever other trade or profession they may happen to carry on.

Or, secondly, by maintaining and employing a certain number of citizens in the constant practice of military exercises, it may render the trade of a soldier a particular trade, separate and distinct from all others.

If the state has recourse to the first of those two expedients, its military force is said to consist in a militia; if to the second, it is said to consist in a standing army. The practice of military exercises is the sole or principal occupation of the soldiers of a standing army, and the maintenance or pay which the state affords them is the principal and ordinary fund of their subsistence. The practice of military exercises is only the occasional occupation of the soldiers of a militia, and they derive the principal and ordinary fund of their subsistence from some other occupation. In a militia, the character of the labourer, artificer, or tradesman, predominates over that of the soldier; in a standing army, that of the soldier predominates over every other character; and in this distinction seems to consist the essential difference between those two different species of military force.

Militias have been of several different kinds. In some countries, the citizens destined for defending the state seem to have been exercised only, without being, if I may say so, regimented; that is, without being divided into separate and distinct bodies of troops, each of which performed its exercises under its own proper and permanent officers. In the republics of ancient Greece and Rome, each citizen, as long as he remained at home, seems to have practiced his exercises, either separately and independently, or with such of his equals as he liked best; and not to have been attached to any particular body of troops, till he was actually called upon to take the field. In other countries, the militia has not only been exercised, but regimented. In England, in Switzerland, and, I believe, in every other country of modern Europe, where any imperfect military force of this kind has been established, every militiaman is, even in time of peace, attached to a particular body of troops, which performs its exercises under its own proper and permanent officers.

Before the invention of fire-arms, that army was superior in which the soldiers had, each individually, the greatest skill and dexterity in the use of their arms. Strength and agility of body were of the highest consequence, and commonly determined the fate of battles. But this skill and dexterity in the use of their arms could be acquired only, in the same manner as fencing is at present, by practising, not in great bodies, but each man separately, in a particular school, under a particular master, or with his own particular equals and companions. Since the invention of fire-arms, strength and agility of body, or even extraordinary dexterity and skill in the use of arms, though they are far from being of no consequence, are, however, of less consequence. The nature of the weapon, though it by no means puts the awkward upon a level with the skilful, puts him more nearly so than he ever was before. All the dexterity and skill, it is supposed, which are necessary for using it, can be well enough acquired by practising in great bodies.

Regularity, order, and prompt obedience to command, are qualities which, in modern armies, are of more importance towards determining the fate of battles, than the dexterity and skill of the soldiers in the use of their arms. But the noise of fire-arms, the smoke, and the invisible death to which every man feels himself every moment exposed, as soon as he comes within cannon-shot, and frequently a long time before the battle can be well said to be engaged, must render it very difficult to maintain any considerable degree of this regularity, order, and prompt obedience, even in the beginning of a modern battle. In an ancient battle, there was no noise but what arose from the human voice; there was no smoke, there was no invisible cause of wounds or death. Every man, till some mortal weapon actually did approach him, saw clearly that no such weapon was near him. In these circumstances, and among troops who had some confidence in their own skill and dexterity in the use of their arms, it must have been a good deal less difficult to preserve some degree of regularity and order, not only in the beginning, but through the whole progress of an ancient battle, and till one of the two armies was fairly defeated. But the habits of regularity, order, and prompt obedience to command, can be acquired only by troops which are exercised in great bodies.

A militia, however, in whatever manner it may be either disciplined or exercised, must always be much inferior to a well disciplined and well exercised standing army.

The soldiers who are exercised only once a-week, or once a-month, can never be so expert in the use of their arms, as those who are exercised every day, or every other day; and though this circumstance may not be of so much consequence in modern, as it was in ancient times, yet the acknowledged superiority of the Prussian troops, owing, it is said, very much to their superior expertness in their exercise, may satisfy us that it is, even at this day, of very considerable consequence.

The soldiers, who are bound to obey their officer only once a-week, or once a-month, and who are at all other times at liberty to manage their own affairs their own way, without being, in any respect, accountable to him, can never be under the same awe in his presence, can never have the same disposition to ready obedience, with those whose whole life and conduct are every day directed by him, and who every day even rise and go to bed, or at least retire to their quarters, according to his orders. In what is called discipline, or in the habit of ready obedience, a militia must always be still more inferior to a standing army, than it may sometimes be in what is called the manual exercise, or in the management and use of its arms. But, in modern war, the habit of ready and instant obedience is of much greater consequence than a considerable superiority in the management of arms.

Those militias which, like the Tartar or Arab militia, go to war under the same chieftains whom they are accustomed to obey in peace, are by far the best. In respect for their officers, in the habit of ready obedience, they approach nearest to standing armies. The Highland militia, when it served under its own chieftains, had some advantage of the same kind. As the Highlanders, however, were not wandering, but stationary shepherds, as they had all a fixed habitation, and were not, in peaceable times, accustomed to follow their chieftain from place to place; so, in time of war, they were less willing to follow him to any considerable distance, or to continue for any long time in the field. When they had acquired any booty, they were eager to return home, and his authority was seldom sufficient to detain them. In point of obedience, they were always much inferior to what is reported of the Tartars and Arabs. As the Highlanders, too, from their stationary life, spend less of their time in the open air, they were always less accustomed to military exercises, and were less expert in the use of their arms than the Tartars and Arabs are said to be.

A militia of any kind, it must be observed, however, which has served for several successive campaigns in the field, becomes in every respect a standing army. The soldiers are every day exercised in the use of their arms, and, being constantly under the command of their officers, are habituated to the same prompt obedience which takes place in standing armies. What they were before they took the field, is of little importance. They necessarily become in every respect a standing army, after they have passed a few campaigns in it. Should the war in America drag out through another campaign, the American militia may become, in every respect, a match for that standing army, of which the valour appeared, in the last war at least, not inferior to that of the hardiest veterans of France and Spain.

This distinction being well understood, the history of all ages, it will be found, bears testimony to the irresistible superiority which a well regulated standing army has over a militia.

One of the first standing armies, of which we have any distinct account in any well authenticated history, is that of Philip of Macedon. His frequent wars with the Thracians, Illyrians, Thessalians, and some of the Greek cities in the neighbourhood of Macedon, gradually formed his troops, which in the beginning were probably militia, to the exact discipline of a standing army. When he was at peace, which he was very seldom, and never for any long time together, he was careful not to disband that army. It vanquished and subdued, after a long and violent struggle, indeed, the gallant and well exercised militias of the principal republics of ancient Greece; and afterwards, with very little struggle, the effeminate and ill exercised militia of the great Persian empire. The fall of the Greek republics, and of the Persian empire was the effect of the irresistible superiority which a standing army has over every other sort of militia. It is the first great revolution in the affairs of mankind of which history has preserved any distinct and circumstantial account.

The fall of Carthage, and the consequent elevation of Rome, is the second. All the varieties in the fortune of those two famous republics may very well be accounted for from the same cause.

From the end of the first to the beginning of the second Carthaginian war, the armies of Carthage were continually in the field, and employed under three great generals, who succeeded one another in the command; Amilcar, his son-in-law Asdrubal, and his son Annibal: first in chastising their own rebellious slaves, afterwards in subduing the revolted nations of Africa; and lastly, in conquering the great kingdom of Spain. The army which Annibal led from Spain into Italy must necessarily, in those different wars, have been gradually formed to the exact discipline of standing army. The Romans, in the meantime, though they had not been altogether at peace, yet they had not, during this period, been engaged in any war of very great consequence; and their military discipline, it is generally said, was a good deal relaxed. The Roman armies which Annibal encountered at Trebi, Thrasymenus, and Cannæ, were militia opposed to a standing army. This circumstance, it is probable, contributed more than any other to determine the fate of those battles.

The standing army which Annibal left behind him in Spain had the like superiority over the militia which the Romans sent to oppose it; and, in a few years, under the command of his brother, the younger Asdrubal, expelled them almost entirely from that country.

Annibal was ill supplied from home. The Roman militia, being continually in the field, became, in the progress of the war, a well disciplined and well exercised standing army; and the superiority of Annibal grew every day less and less. Asdrubal judged it necessary to lead the whole, or almost the whole, of the standing army which he commanded in Spain, to the assistance of his brother in Italy. In this march, he is said to have been misled by his guides; and in a country which he did not know, was surprised and attacked, by another standing army, in every respect equal or superior to his own, and was entirely defeated.

When Asdrubal had left Spain, the great Scipio found nothing to oppose him but a militia inferior to his own. He conquered and subdued that militia, and, in the course of the war, his own militia necessarily became a well disciplined and well exercised standing army. That standing army was afterwards carried to Africa, where it found nothing but a militia to oppose it. In order to defend Carthage, it became necessary to recal the standing army of Annibal. The disheartened and frequently defeated African militia joined it, and, at the battle of Zama, composed the greater part of the troops of Annibal. The event of that day determined the fate of the two rival republics.

From the end of the second Carthaginian war till the fall of the Roman republic, the armies of Rome were in every respect standing armies. The standing army of Macedon made some resistance to their arms. In the height of their grandeur, it cost them two great wars, and three great battles, to subdue that little kingdom, of which the conquest would probably have been still more difficult, had it not been for the cowardice of its last king. The militias of all the civilized nations of the ancient word, of Greece, of Syria, and of Egypt, made but a feeble resistance to the standing armies of Rome. The militias of some barbarous nations defended themselves much better. The Scythian or Tartar militia, which Mithridates drew from the countries north of the Euxine and Caspian seas, were the most formidable enemies whom the Romans had to encounter after the second Carthaginian war. The Parthian and German militias, too, were always respectable, and upon several occasions, gained very considerable advantages over the Roman armies. In general, however, and when the Roman armies were well commanded, they appear to have been very much superior; and if the Romans did not pursue the final conquest either of Parthia or Germany, it was probably because they judged that it was not worth while to add those two barbarous countries to an empire which was already too large. The ancient Parthians appear to have been a nation of Scythian or Tartar extraction, and to have always retained a good deal of the manners of their ancestors. The ancient Germans were, like the Scythians or Tartars, a nation of wandering shepherds, who went to war under the same chiefs whom they were accustomed to follow in peace. Their militia was exactly of the same kind with that of the Scythians or Tartars, from whom, too, they were probably descended.

Many different causes contributed to relax the discipline of the Roman armies. Its extreme severity was, perhaps, one of those causes. In the days of their grandeur, when no enemy appeared capable of opposing them, their heavy armour was laid aside as unnecessarily burdensome, their laborious exercises were neglected, as unnecessarily toilsome. Under the Roman emperors, besides, the standing armies of Rome, those particularly which guarded the German and Pannonian frontiers, became dangerous to their masters, against whom they used frequently to set up their own generals. In order to render them less formidable, according to some authors, Dioclesian, according to others, Constantine, first withdrew them from the frontier, where they had always before been encamped in great bodies, generally of two or three legions each, and dispersed them in small bodies through the different provincial towns, from whence they were scarce ever removed, but when it became necessary to repel an invasion. Small bodies of soldiers, quartered in trading and manufacturing towns, and seldom removed from those quarters, became themselves tradesmen, artificers, and manufacturers. The civil came to predominate over the military character; and the standing armies of Rome gradually degenerated into a corrupt, neglected, and undisciplined militia, incapable of resisting the attack of the German and Scythian militias, which soon afterwards invaded the western empire. It was only by hiring the militia of some of those nations to oppose to that of others, that the emperors were for some time able to defend themselves. The fall of the western empire is the third great revolution in the affairs of mankind, of which ancient history has preserved any distinct or circumstantial account. It was brought about by the irresistible superiority which the militia of a barbarous has over that of a civilized nation; which the militia of a nation of shepherds has over that of a nation of husbandmen, artificers, and manufacturers. The victories which have been gained by militias have generally been, not over standing armies, but over other militias, in exercise and discipline inferior to themselves. Such were the victories which the Greek militia gained over that of the Persian empire; and such, too, were those which, in later times, the Swiss militia gained over that of the Austrians and Burgundians.