The Wealth of Nations by Part 5 Chapter 1 Page 52

this respect, been a good deal enhanced by a great revolution in the art of war, to which a mere accident, the invention of gunpowder, seems to have given occasion.

In modern war the great expense of firearms gives an evident advantage to the nation which can best afford that expense, and consequently to an opulent and civilised over a poor and barbarous nation. In ancient times the opulent and civilised found it difficult to defend themselves against the poor and barbarous nations. In modern times the poor and barbarous find it difficult to defend themselves against the opulent and civilised. The invention of firearms, an invention which at first sight appears to be so pernicious, is certainly favourable both to the permanency and to the extension of civilization.

2. Of the Expense of Justice