The expense of a military force is different at different periods
Among hunters it costs nothing
When shepherds go to war the whole nation moves with its property
and the sovereign is at no expense
Shepherds are far more formidable than hunters.
Husbandmen with little commerce and only household manufactures are easily converted into soldiers, and it seldom costs the sovereign anything to prepare them for the field,
or to maintain them when they have taken the field
Later it becomes necessary to pay those who take the field,
since artificers and manufacturers must be maintained by the public when away from their work,
and the greater length of campaigns makes service without pay too heavy a burden even for husbandmen
The possible proportion of soldiers to the rest of the population is much smaller in civilised times.
The expense of preparing for the field was long inconsiderable.
Soldiers were not a distinct class in Greece and Rome, nor at first in feudal times.
But as war becomes more complicated, division of labour becomes necessary to carry the art to perfection.
As society advances the people become unwarlike
There are only two methods of providing for defence,
(1) to enforce military exercises and service.
or (2) to make the trade of the soldier a separate one:
in other words the establishment of a militia or a standing army.
Militias were anciently only exercised and not regimented.
Fire-arms brought about the change by making dexterity less important,
and discipline much more so
A militia is always inferior to a standing army,
being less expert,
and less well disciplined.
The best militias are those which go to war under the chieftains who rule in time of peace
A militia kept long enough in the field becomes a standing army
History shows the superiority of the standing army
That of Macedon defeated the Greek militias
In the wars of Carthage and Rome standing armies defeated militias
The Carthaginian standing army defeated the Roman militia in Italy
and Spain
When the Roman militias became a standing army they defeated the Carthaginian standing army in Italy
and the Carthaginian militia in Spain, and both standing army and militia in Africa
Thence forward the Roman republic had standing armies which found little resistance except from the standing army of Macedon
Under the emperors these armies degenerated into militias.
Militias were gradually superseded by standing armies in Western Europe
A standing army does not lose its valour in time of peace,
and is the only safeguard of a civilised nation.
also the only means of civilising a barbarous one
It is not unfavourable to liberty
Defence thus grows more expensive
Fire-arms enhance the expense,
and so give an advantage to rich nations, which is favourable to civilisation