 Governance within a society requires that the society somehow accomplish each of these four tasks. A society might do so in a number of different ways. A governance structure is the set of institutional structures within a society that address one or more of the four problems of adaptation, detection, application, and sanction that are the central elements of governance. An institutional structure is a decision-making protocol that specifies procedures relevant to the resolution of one or more of the problems of adaptation, detection, application, and sanction. Clear understanding requires a distinction here between institutional structures, realized institutions, and functioning institutions. This distinction parallels the distinction between game forms, games, and plays of a game in the theory of games. As noted before, an institutional structure is simply the basic rules or protocol for governance; a realized institution is an institutional structure situated in a given society and populated by particular individuals; and a functioning institution is a realized institution as it operates in a society in actual conditions.