Security dilemma: armaments amassed by states for what they claim to be defensive purposes are seen by others as threatening, and this has driven the alarmed competitors to undertake, as countermeasures, additional military build-ups. Realism school of thought that teaches that the drive for power and the domination of others for self advantage is a universal and permanent motive throughout world history. Practical choices for states to national and international security: arming themselves, forming or servering alliances, contstructing strategies for controlling destinies thorugh military and coercive diplomacy. Coercive diplomacy the use of threats or limited armed force to persuade an adversary to alter its foreign and or domestic policies. Realism = war at top of states concerns. Belief that all people and states seek power. Power is the poltical capacity of one actor to exercise influence over another actor to the first"s benefit. Power as a combination of factors that gives states the capability to promote national interests.