The Wealth of Nations by Part 4 Chapter 7 Page 198

since the world began, the only state which, as it has extended its empire, has only increased its expense without once augmenting its resources. Other states have generally disburdened themselves upon their subject and subordinate provinces of the most considerable part of the expense of defending the empire. Great Britain has hitherto suffered her subject and subordinate provinces to disburden themselves upon her of almost this whole expense. In order to put Great Britain upon a footing of equality with her own colonies, which the law has hitherto supposed to be subject and subordinate, it seems necessary, upon the scheme of taxing them by Parliamentary requisition, that Parliament should have some means of rendering its requisitions immediately effectual, in case the colony assemblies should attempt to evade or reject them; and what those means are, it