The following is an analysis of the relationship between incompatibility, conflict and breakdown. It is restricted to situations of a certain sort — to the isolation of the conditions under which breakdowns occur. These conditions are specific and defineable. Under certain circumstances incompatibilities and conflicts culminate in growth, under others in separation, under others in outright destruction of one of the incompatible elements, under others still in dominance-subserviance relationships and under others in breakdown. This is a matter of some importance since influential current conceptions treat incompatibility and conflict as though they were uniform in outcome. The followers of Hegel regard them as always making for growth whereas certain contemporaries (Toynbee and others) look upon them as the prime movers of breakdown and decline. The truth of the matter would seem to be that neither of these theories is correct. Conflicts vary, their consequences vary and the conditions under which they occur vary. For empirical analysis the important thing is the disengagement of the differences making for different culminations as well as the relations common to all; and the working out, as far as possible, of the way in which alterations in certain basic factors make for changes in result. A specific analysis of this sort may be valuable for foresight and even for a degree of control where the conditions are accessible to our manipulation.