Once again, the way these interactions and relationships arise and the particular form or substance they take would seem to be explainable in terms of the way the decision-makers in the participating political organisms "define their situation". As we have said elsewhere, there seem to be only two ways of scientifically studying international politics:
1. The description and measurement of interaction;
2. Decision-making - the formulation and execution of policy. Interaction patterns can be studied by themselves without reference to decision-making except that the why of the patterns cannot be answered.