Having now sketched the origin and nature of written constitutions, we are prepared to understand how by means of such a document the government of our Federal Union was called into existence. We have already described so much of the civil government in operation in the United States that this account can be made much more concise than if we had started at the top instead of the bottom and begun to portray our national government before saying a word about states and counties and towns. Bit by bit the general theory of American self-government has already been set before the reader. We have now to observe, in conclusion, what a magnificent piece of constructive work has been performed in accordance with that general theory. We have to observe the building up of a vast empire out of strictly self-governing elements. [Sidenote: English institutions in all the colonies.] There was always one important circumstance in favour of the union of the thirteen American colonies into a federal nation. The inhabitants were all substantially one people. It is true that in some of the colonies there were a good many persons not of English ancestry, but the English type absorbed and assimilated everything else. All spoke the English language, all had English institutions. Except the development of the written constitution, every bit of civil government described in the preceding pages came to America directly from England, and not a bit of it from any other country, unless by being first filtered through England. Our institutions were as English as our speech. It was therefore comparatively easy for people in one colony to understand people in another, not only as to their words but as to their political ideas. Moreover, during the first half of the eighteenth century, the common danger from the aggressive French enemy on the north and west went far toward awakening in the thirteen colonies a common interest. And after the French enemy had been removed, the assertion by parliament of its alleged right to tax the Americans threatened all the thirteen legislatures at once, and thus in fact drove the colonies into a kind of federal union.