In 1654, he published a "Letter upon Liberty and Necessity;" this brief tractate is unsurpassed in Free-thought literature for its clear, concise, subtle, and demonstrative proofs of the self-determining power of the will, and the truth of philosophical necessity. All subsequent writers on this question have largely availed themselves of Hobbes's arguments, particularly the pamphleteers of Socialism. It is a fact no less true than strange, that Communism is derived from the system of Hobbes, which has always been classed along with that of Machiavelli, as an apology for despotism. The grand peculiarity of Hobbes is his method. Instead of taking speculation and reasoning upon theories, he carried out the inductive system of Bacon in its entirety, reasoning from separate generic facts, instead of analogically. By this means he narrowed the compass of knowledge, and made everything demonstrative that was capable of proof. Belief was consequently placed upon its proper basis, and a rigid analysis separated the boundaries of Knowing and Being. Hobbes looked at the great end of existence and embodied it in a double axiom. 1st. The desire for self-preservation. 2nd. To render ourselves happy. From those duplex principles which are inherent in all animals, a modern politician has perpetrated a platitude which represents in a sentence the end and aim of all legislation, "the greatest happiness for the greatest number." This is the _ultimatum_ of Hobbes's philosophy. Its method of accomplishment was by treating society as one large family, with the educated and skilled as governors, having under their care the training of the nation. All acting from one impulse (self-preservation,) and by the conjoint experience of all, deriving the greatest amount of happiness from this activity. Hobbes opposed the Revolution, because it degenerated into a faction; and supported Charles Stuart because there were more elements of cohesion within his own party, than amongst his enemies. It was here where the cry of despotism arose; the "Round-heads" seeing they could not detach the ablest men from the King's party, denounced their literary opponents as "lovers of Belial, and of tyranny." This was their most effective answer to the "Leviathan." In after years, when the Episcopal party no longer stood in need of the services of Hobbes, they heaped upon him the stigma of heresy, until his _ci-devant_ friends and enemies were united in the condemnation of the man they most feared. Mr. Owen, in his schema of Socialism, took his leading idea on non-responsibility from Hobbes's explanation of necessity, and the freedom of the will. The old divines had inculcated a doctrine to the effect that the "will" was a separate entity of the human mind, which swayed the whole disposition, and was of itself essentially corrupt. Ample testimony from the Bible substantiated this position. But in the method of Hobbes, he lays down the facts that