Evidently an economic inquiry which occupies itself exclusively with the movements of this consistent, elemental human nature under given, stable institutional conditions--such as is the case with the current hedonistic economics--can reach statical results alone; since it makes abstraction from those elements that make for anything but a statical result. On the other hand an adequate theory of economic conduct, even for statical purposes, cannot be drawn in terms of the individual simply--as is the case in the marginal-utility economics--because it cannot be drawn in terms of the underlying traits of human nature simply; since the response that goes to make up human conduct takes place under institutional norms and only under stimuli that have an institutional bearing; for the situation that provokes and inhibits action in any given case is itself in great part of institutional, cultural derivation. Then, too, the phenomena of human life occur only as phenomena of the life of a group or community: only under stimuli due to contact with the group and only under the (habitual) control exercised by canons of conduct imposed by the group's scheme of life. Not only is the individual's conduct hedged about and directed by his habitual relations to his fellows in the group, but these relations, being of an institutional character, vary as the institutional scheme varies. The wants and desires, the end and aim, the ways and means, the amplitude and drift of the individual's conduct are functions of an institutional variable that is of a highly complex and wholly unstable character.