Irregular Systemes, in their nature, but Leagues, or sometimes meer concourse of people, without union to any particular designe, not by obligation of one to another, but proceeding onely from a similitude of wills and inclinations, become Lawfull, or Unlawfull, according to the lawfulnesse, or unlawfulnesse of every particular mans design therein: And his designe is to be understood by the occasion.
The Leagues of Subjects, (because Leagues are commonly made for mutuall defence,) are in a Common-wealth (which is no more than a League of all the Subjects together) for the most part unnecessary, and savour of unlawfull designe; and are for that cause Unlawfull, and go commonly by the name of factions, or Conspiracies. For a League being a connexion of men by Covenants, if there be no power given to any one Man or Assembly, (as in the condition of meer Nature) to compell them to performance, is so long onely valid, as there ariseth no just cause of distrust: and therefore Leagues between Common-wealths, over whom there is no humane Power established, to keep them all in awe, are not onely lawfull, but also profitable for the time they last. But Leagues of the Subjects of one and the same Common-wealth, where every one may obtain his right by means of the Soveraign Power, are unnecessary to the maintaining of Peace and Justice, and (in case the designe of them be evill, or Unknown to the Common-wealth) unlawfull. For all uniting of strength by private men, is, if for evill intent, unjust; if for intent unknown, dangerous to the Publique, and unjustly concealed.