Diplomacy has long been neglected as a preoccupation of international theory. To repair this deficiency, this essay focuses upon bargaining over interstate disputes and makes two distinctions. One is between diplomacy as independent and as dependent variable. Analysis of diplomacy as independent variable studies diplomatic practice as causal influence, as when overcoming pressures that increase the danger of war or deadlock. This perspective is important for developing a diplomatic ‘point of view’. Dependent diplomacy analysis is preoccupied with constraints upon diplomatic statecraft and with adaptation to them. A second distinction is between negotiated bargaining, to reconcile divergent state interests, and non-negotiated bargaining that converges upon common interests between states. The essay dwells upon the link between independent diplomacy and negotiated bargaining, on one hand, and dependent diplomacy and convergent bargaining, on the other.