A psychological blockage has prevented the application of behavioral study to the contemporary history of political forms, and especially to an inquiry as to why the democratic system in the free-world sense has failed in so many areas. The rhetoric of civil liberty is seldom dedicated to the examination of the public orthodoxy in divergent forms of government, and among liberals there is a tendency to overlook the practicalities of totalitarianism among the countries of the world socialist system. In all of the democratic systems there is some relation between the parties which dominate the representative parliament or congress and the chief executive. In general, if the regime is not that of a strong man or of a dictatorial party, the relationship is either presidential or parliamentary. The central democratic institution is the parliament or congress; and a democracy may have social policies which in fact deny to many that it has any claim to being a just regime.