The seeds of great monarchies, and the roots of extensive dominion, were every where planted with the colonies that divided the Roman empire. We have no exact account of the numbers, who, with a seeming concert, continued, during some ages, to invade and to seize this tempting prize. Where they expected resistance, they endeavoured to muster up a proportional force; and when they proposed to settle, entire nations removed to share in the spoil. Scattered over an extensive province, where they could not be secure, without maintaining their union, they continued to acknowledge the leader under whom they had fought; and, like an army sent by divisions into separate stations, were prepared to assemble whenever occasion should require their united operations or counsels. Every separate party had its post assigned, and every subordinate chieftain his possessions, from which he was to provide his own subsistence, and that of his followers. The model of government was taken from that of a military subordination, and a fief was the temporary pay of an officer proportioned to his rank. [Footnote: See Dr. Robertson's History of Scotland, B. 1.--Dalrymple's Hist. of Feudal Tenures.] There was a class of the people destined to military service, another to labour, and to cultivate lands for the benefit of their masters. The officer improved his tenure by degrees, first changing a temporary grant into a tenure for his life; and this also, upon the observance of certain conditions, into a grant including his heirs. The rank of the nobles became hereditary in every quarter, and formed a powerful and permanent order of men in every state. While they held the people in servitude, they disputed the claims of their sovereign; they withdrew their attendance upon occasion, or turned their arms against him. They formed a strong and insurmountable barrier against a general despotism in the state; but they were themselves, by means of their warlike retainers, the tyrants of every little district, and prevented the establishment of order, or any regular applications of law. They took the advantage of weak reigns or minorities, to push their encroachments on the sovereign; or having made the monarchy elective, they, by successive treaties and stipulations, at every election, limited or undermined the monarchical power. The prerogatives of the prince have been, in some instances, as in that of the German empire in particular, reduced to a mere title; and the national union itself preserved in the observance only of a few insignificant formalities.