It is thus that every system which endeavours, either, by extraordinary encouragements to draw towards a particular species of industry a greater share of the capital of the society than what would naturally go to it, or, by extraordinary restraints, to force from a particular species of industry some share of the capital which would otherwise be employed in it, is, in reality subversive of the great purpose which it means to promote. It retards, instead of accelerating, the progress of the society towards real wealth and greatness; and diminishes, instead of increasing, the real value of the annual produce of its land and labour.

All systems, either of preference or of restraint, therefore, being thus completely taken away, the obvious and simple system of natural liberty establishes itself of its own accord. Every man, as long as he does not violate the laws of justice, is left perfectly free to pursue his own interest his own way, and to bring both his industry and capital into competition with those of any other man, or order of men. The sovereign is completely discharged from a duty, in the attempting to perform which he must always be exposed to innumerable delusions, and for the proper performance of which, no human wisdom or knowledge could ever be sufficient; the duty of superintending the industry of private people, and of directing it towards the employments most suitable to the interest of the society. According to the system of natural liberty, the sovereign has only three duties to attend to; three duties of great importance, indeed, but plain and intelligible to common understandings: first, the duty of protecting the society from violence and invasion of other independent societies; secondly, the duty of protecting, as far as possible, every member of the society from the injustice or oppression of every other member of it, or the duty of establishing an exact administration of justice; and, thirdly, the duty of erecting and maintaining certain public works, and certain public institutions, which it can never be for the interest of any individual, or small number of individuals to erect and maintain; because the profit could never repay the expense to any individual, or small number of individuals, though it may frequently do much more than repay it to a great society.

The proper performance of those several duties of the sovereign necessarily supposes a certain expense; and this expense again necessarily requires a certain revenue to support it. In the following book, therefore, I shall endeavour to explain, first, what are the necessary expenses of the sovereign or commonwealth; and which of those expenses ought to be defrayed by the general contribution of the whole society; and which of them, by that of some particular part only, or of some particular members of the society; secondly, what are the different methods in which the whole society may be made to contribute towards defraying the expenses incumbent on the whole society; and what are the principal advantages and inconveniences of each of those methods; and thirdly, what are the reasons and causes which have induced almost all modern governments to mortgage some part of this revenue, or to contract debts; and what have been the effects of those debts upon the real wealth, the annual produce of the land and labour of the society. The following book, therefore, will naturally be divided into three chapters.

INDEX.

The two following accounts are subjoined, in order to illustrate and confirm what is said in the fifth chapter of the fourth book, concerning the Tonnage Bounty to the White-herring Fishery. The reader, I believe, may depend upon the accuracy of both accounts.

An Account of Busses fitted out in Scotland for eleven Years, with the Number of empty Barrels carried out, and the Number of Barrels of Herrings caught; also the Bounty, at a Medium, on each Barrel of Sea-sticks, and on each Barrel when fully packed.

Years.Number of
Busses.		Empty Barrels
carried out.		Barrels of
Herrings caught.		Bounty paid
on the Busses.
L. s. d.
1771 29 5,948 2,832 2,885 0 0
1772 168 41,316 22,237 11,055 7 6
1773 190 42,333 42,055 12,510 8 6
1774 240 59,303 56,365 26,952 2 6
1775 275 69,144 52,879 19,315 15 0
1776 294 76,329 51,863 21,290 7 6
1777 240 62,679 45,313 17,592 2 6
1778 220 56,390 40,958 16,316 2 6
1779 206 55,194 29,367 15,287 0 0
1780 181 48,315 19,885 13,445 12 6
1781 135 33,992 16,593 9,613 15 6
Total, 2,186 550,943 378,347L.165,463 14 0
Sea-sticks,378,347
1-3d deducted,126,1152⁄3
————
Barrels fully packed, 252,2311⁄3