This study assumes that political terrorism results from conscious decision-making by groups opposing a governing system, policy or process. The kinds of terrorist activity employed depend upon such factors as the philosophy, goals, objectives, and needs of the terrorist group. This presents a comparative analysis of three types of terrorists in southwest Asia: Palestinians, Marxist-Leninists, and Muslims. The first section summarizes and compares the three groups' motivational causes, philosophies, histories and sources of inspiration. The second section compares their behavior from four perspectives: trends and patterns, level of violence, tactical preferences, and lethality. The third section identifies and categorizes socioeconomic, political and military variables associated with tactic selection and acts of terrorism.

Traditional studies of the modernization-instability thesis have neglected the simultaneous influence of time and place on the relationship between modernization (social mobilization and political participation) and political instability, and the possible causal linkage between the two concepts. Empirical support for modernization-instability hypothesis will be obtained if and only if there is a strong positive correlation between modernization and political instability and the former causes the latter unidirectionally. Only then can one assert that modernization is exogenous, and that a policy geared toward restricting modernization is a proper anti-instability policy. This work attempts to address the question of correlation and causality through a pooled time-series cross-sectional data design and the use of Granger-causality tests. Particular attention is paid to the error structure of the models. Using pooled regression, a model of political instability is estimated for a total of 35 countries for the period 1960-1982. Granger tests are performed on twelve separate countries randomly selected from the 35. The results indicate that there is the expected positive relationship between modernization and political instability. Further, political institutionalization and economic well-being have strong negative influence on political instability. With regard to causality, the results vary by country. Some countries experience no causality between …