resistance on some side, and consequently exposing itself to danger. Chevalier von Gentz, quoted by Taylor, Int. Pub. Law 98. Four conditions necessary as a basis of such an equilibrium (1) that no state must ever become so powerful as to coerce all the rest; (2) that every state which infringes the con- ditions is liable to be coerced by others; (3) that the fear of coercion should keep all within the bounds of moderation; and (4) that a state having attained a degree of power to defy the union should be treated as a common enemy. Id.