Mill's theory is contained in his _Logic_, his _Utilitarianism_, and his books on Comte and Hamilton. It has become known by the name he gave it as Utilitarianism; and as Bentham was the founder and first leader of the school, so was Mill the successor to his position and authority. It is a modern form of the theory associated with the name of the philosopher Epicurus; and on that ground it has been subjected to moral censure. Perhaps ultimately, as directed against the principle, the censure is sound; but it cannot be fairly turned against individuals. Certainly no thinkers of their time laboured more strenuously for the good of the community than Mill and Bentham. In Bentham's exposition, the philosophy crystallised itself in the often-quoted phrase, 'the greatest happiness of the greatest number.' His contribution consists in the introduction of the idea of the greatest number. Whether that idea is logically consistent with a philosophy of pleasure may be questioned; but it was to Bentham's addition that the maxim owed its power and its practical influence on legislation. It was moreover this consideration, in addition to the fact that he breathed Benthamite ideas from the cradle, that attracted Mill. For he was a typically English philosopher. He never of his own choice dwelt long on purely metaphysical problems, nor did he succeed well when he was forced to attempt them. His attitude towards Hume's theory of cause, after Kant's criticism of it, is vividly illustrative of his speculative limitations. If Oxford is the place where German philosophies go when they die, apparently London in Mill's time was the place where German philosophies did not go at all; and even dead German philosophies are better than the English predecessors which they slew in the day of their vigour. As a Utilitarian, Mill was more valuable for exposition than for the original elements of his thought. In all his writings he is clear in expression and abundant in illustration. This abundance, in truth, appears to the reader not wholly ignorant of the subject to be cognate to verbosity. It was however part of the secret of Mill's great influence. He forced people to understand him. He talked round and round the subject, looked at it from every point of view and piled example upon example, until it was impossible to miss his meaning. When we add wide knowledge, patient study, keen intelligence and a considerable, if not exactly a great talent for original speculation, Mill's influence as a philosopher is explained. He wielded, from the publication of his _Logic_ till his death, a greater power than any other English thinker, unless Sir William Hamilton is to be excepted for the earlier part of the period.