This conflict escalation model is presented in Friedrich Glasl's book Konfliktmanagement. Ein Handbuch für Führungskräfte, Beraterinnen und Berater, (Bern: Paul Haupt Verlag, 1997. See also the endnotes). Glasl's original analysis of the stages comprises over 70 pages, and my summary does not in any way make full justice to his model. However, this summary has been scrutinized and approved of (with some corrections) by Friedrich Glasl. Glasl's escalation model is a very useful diagnostic tool for the conflict facilitator, but also valuable as a means for sensitizing people to the mechanisms of conflict escalation. Such sensitizing may lead to a greater awareness of the steps one should take care to avoid if one wants to prevent a conflict from escalating out of control. In a more academic perspective, the model also provides a theory of conflict escalation that emphasizes the situational pressures acting upon people involved in a conflict. Rather than seeking causes in the individuals, the model emphasizes how there is an internal logic to conflict relationships, stemming from the failure of "benign" ways of handling contradictory interests and standpoints. Conscious efforts are needed in order to resist the escalation mechanisms, which are seen as having a momentum of their own. STAGE 1: HARDENING The first stage of conflict escalation develops when a difference over some issue or frustration in a relationship proves resilient to resolution efforts. The problem remains, and leads to irritation. Repeated efforts to overcome the difficulties fail, which means that the natural flow of shifting concerns is blocked. The parties are repeatedly reminded that in a particular field, they are not getting forward. Interests and opinions crystallize into standpoints, i.e. fixed positions on how a certain issue ought to be handled. These standpoints tend to become mutually incompatible in the perception of the conflict parties.