Democracy is the form of government in which the free are rulers, and oligarchy in which the rich; it is only an accident that the free are the many and the rich are the few.
The case for trade is not just monetary, but moral. Economic freedom creates habits of liberty. And habits of liberty create expectations of democracy.
These, then, will be some of the features of democracy... it will be, in all likelihood, an agreeable, lawless, parti-colored commonwealth, dealing with all alike on a footing of equality, whether they be really equal or not.