The behaviouralism is the main political theory. To study and understand the main aims of   behaviouralism we should answer on a simple question – Why do individuals, institutional actors and nation states behave the way they do? Behaviouralists insistence that the individual or the social aggregate should be the focus of analysis and that behaviour should be susceptible to empirical testing. Behaviouralists have extensively analyzed the reasons that underline the main form of mass political participation in democratic countries: voting. They even observe origins of other forms of political activity such as demonstrations and strikes. Beside of that scholars have analyzed leadership behaviour, their attitudes, values and the particular actions that they take. In terms of social agreements, behavioural analyses has examined the actions of interest groups, political parties. At the international level it also focused on the actions of nation states, on the behaviour of non-state actors such as multinational corporations, international terrorist groups and supranational organizations like the EU. In this case the central question that behaviouralists seek to answer is: What do the actors involved actually do and how can we best explain why they do it ? in this connection would not be the only questions that can be asked about individual and social actors but in any case behaviouralists simply believe that they are the most important ones.
The main characteristic of the behavioural movement was that   behavioural movement assumed an important position in the social science in the 50s and 60s years of the previous century. It would not be coorect to assume that behaviouralism accepted all the philosophical precepts of positivism. There are many definition of these two critical term, most behaviouralists would probably accept: An empirical theory is a set of interconnected abstract statements, consisting of assumptions, definitions and empirically...