The paper discusses the problem of difficult conflicts, whose dynamics is characterised by intensifi cation of factors influencing the course of a conflict, and conflicts which are considerably difficult to resolve. Among many conflicts of high intensity and escalation it is legitimate to identify a specific group of conflicts which can be viewed in a special way due to their parameters. The author of the paper suggests that they should be distinguished and regarded as a specific type of conflict called an expansive conflict. Expansive means expanding in size or scope, aiming at extension of influence or power, or in another sense: insistent and intemperate in expression of feelings, quick-tempered, effusive. Expansiveness means striving for enhancement of one’s impact, impulsiveness and effusiveness, as well as a kind of possessiveness manifested in extending one’s influence to more and more new areas. Therefore, asking about expansiveness, we pose questions: why – who – where – how strong – how fast. Th ese are the questions about the origin, parties to the confl ict, its place, force and rate of spreading. This uncomplicated model can be used to describe a conflict. The introduction of the notion of an expansive conflict can be justified and applied in practice for conflict processes of the extraordinary course, especially in relation to macro conflicts originating in the sphere of politics (superpower policy versus democratisation), economy (corporations) or culture (expansion of mass culture).