The hypothesis presented makes possible a consistently empirical or _historical_ treatment of the changes in political forms and arrangements, free from any overriding conceptual domination such as is inevitable when a “true” state is postulated, whether that be thought of as deliberately made or as evolving by its own inner law. Intrusions from non-political internal occurrences, industrial and technological, and from external events, borrowings, travel, migrations, explorations, wars, modify the consequences of preëxisting associations to such an extent that new agencies and functions are necessitated. Political forms are also subject to alterations of a more indirect sort. Developments of better methods of thinking bring about observation of consequences which were concealed from a vision which used coarser intellectual tools. Quickened intellectual insight also makes possible invention of new political devices. Science has not indeed played a large rôle. But intuitions of statesmen and of political theorists have occasionally penetrated into the operations of social forces in such a way that a new turn has been given to legislation and to administration. There is a margin of toleration in the body politic as well as in an organic body. Measures not in any sense inevitable are accommodated to after they have once been taken; and a further diversity is thereby introduced in political manners. In short, the hypothesis which holds that publics are constituted by recognition of extensive and enduring indirect consequences of acts accounts for the relativity of states, while the theories which define them in terms of specific causal authorship imply an absoluteness which is contradicted by facts. The attempt to find by the “comparative method” structures which are common to antique and modern, to occidental and oriental states, has involved a great waste of industry. The only constant is the function of caring for and regulating the interests which accrue as the result of the complex indirect expansion and radiation of conjoint behavior.