| Term | Definition |
| Assymetric war | an armed conflict between belligerents of vastly unequal military strength, in which the weaker side is often a nonstate actor that relies on unconventional tactics |
| Bush Doctrine | a policy that singles out states that support terrorist groups and advocates military strikes against them to prevent a future attack on the United States |
| Crosscutting Cleavages | a situation where politically relevant divisions between international actors are contradictory, with their interests pulling them together on some issues and separating them on others |
| Failing States | states in danger of political collapse due to overwhelming internal strife |
| Information Warfare | attacks on an adversary's telecommunications and computer networks to degrade the technological systems vital to its defense and economic well-being |
| Overlapping Cleavages | a situation where politically relevant divisions between international actors are complementary; interests pulling them apart on one issue are reinforced by interests that also separate them on other issues |
| Power Cycle Theory | the contention that armed conflict is probable when a state passes through certain critical points along a generalized curve of relative power, and wars of enormous magnitude are likely when several great powers pass through critical points at approximately the same time |
| Power Transition Theory | the contention that war is likely when a dominant great power is threatened by the rapid growth of a rival's capabilities, which reduces the difference in their relative power |
| Relative Deprivation | people's perception that they are unfairly deprived of wealth and status in comparison to others who are advantaged but not more deserving |
| Socialization | the processes by which people learn the beliefs, values, and behaviors that are acceptable in a given society |
| State-sponsored Terrorism | formal assistance, training, and arming of foreign terrorists by a state in order to achieve foreign policy goals |
| Terrorism | the premeditated use or threat of violence perpetrated against noncombatants, usually intended to induce fear in a wider audience |
| Xenophobia | a fear of foreigners |