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 development of these factors in each human being that makes his life worth having, so it is their harmonious interaction, the response of each to each, that makes of society a living whole. Liberty so interpreted cannot, as we have seen, dispense with restraint; restraint, however, is not an end but a means to an end, and one of the principal elements in that end is the enlargement of liberty.

But the collective activity of the community does not necessarily proceed by coercion or restraint. The more securely it is founded on freedom and general willing assent, the more it is free to work out all the achievements in which the individual is feeble or powerless while combined action is strong. Human progress, on whatever side we consider it, is found to be in the main social progress, the work of conscious or unconscious co-operation. In this work voluntary association plays a large and increasing part. But the State is one form of association among others, distinguished by its use of coercive power, by its supremacy, and by its claim to control all who dwell within its geographical limits. What the functions of such a form of association are to be we shall have to consider a