The fundamental lesson, not merely of the Jordanian civil war, but of the entire history of the Palestinian Resistance Movement from the standpoint of its relations with the Arab regimes, is that the Movement's dependence on those regimes has been the main impediment to its chances for success. Some causes of this dependence are admittedly beyond the control of the Movement, but others--notably the plurality of member organizations and internal ideological differences--are not. Although popular support has helped the Resistance to counteract the weakening effect of dependence, the Palestinian Movement is likely to remain at the mercy of the dynamics of inter-Arab politics--as it has since its inception--for as long as it lacks a substantial degree of structural unity and ideological cohesion. 34 pp. Ref.