Types of classification schemes
The almost infinite range of political systems has been barely suggested in this brief review. Confronted by the vast array of political forms, political scientists have attempted to classify and categorize, to develop typologies and models, or in some other way to bring analytic order to the bewildering variety of data. Many different schemes have been developed. There is, for example, the classical distinction between governments in terms of the number of rulers—government by one man (monarchy or tyranny), government by the few (aristocracy or oligarchy), and government by the many (democracy). There are schemes classifying governments in terms of their key institutions (for example, parliamentarism, cabinet government, presidentialism). There are classifications that group systems according to basic principles of political authority or the forms of legitimacy (charismatic, traditional, rational-legal, and others). Other schemes distinguish between different kinds of economic organization in the system (the laissez-faire state, the corporate state, and socialist and communist forms of state economic organization) or between the rule of different economic classes (feudal, bourgeois, and capitalist). And there are modern efforts to compare the functions of political systems (capabilities, conversion functions, and system maintenance and adaptation functions) and to classify them in terms of structure, function, and political culture.
Although none is comprehensive, each of these principles of analysis has some validity, and the classifying schemes that are based on them, although in some cases no longer relevant to modern forms of political organization, have often been a major influence on the course of political development. The most influential of such classifying schemes is undoubtedly the attempt of Plato and Aristotle to define the basic forms of government in terms of the number of power holders and their use or abuse of power. Plato held that there was a natural succession of the forms of government: an aristocracy (the ideal form of government by the few) that abuses its power develops into a timocracy (in which the rule of the best men, who value wisdom as the highest political good, is succeeded by the rule of men who are primarily concerned with honour and martial virtue), which through greed develops into an oligarchy (the perverted form of government by the few), which in turn is succeeded by a democracy (rule by the many); through excess, the democracy becomes an anarchy (a lawless government), to which a tyrant is inevitably the successor. Abuse of power in the Platonic typology is defined by the rulers’ neglect or rejection of the prevailing law or custom (nomos); the ideal forms are thus nomos observing (ennomon), and the perverted forms are nomos neglecting (paranomon). Although disputing the character of this implacable succession of the forms of government, Aristotle also based his classification on the number of rulers and distinguished between good and bad forms of government. In his typology it was the rulers’ concern for the common good that distinguished the ideal from perverted forms of government. The ideal forms in the Aristotelian scheme are monarchy, aristocracy, and polity (a term conveying some of the meaning of the modern concept of “constitutional democracy”); when perverted by the selfish abuse of power, they are transformed respectively into tyranny, oligarchy, and ochlocracy (or the mob rule of lawless democracy). The concept of the polity, a “mixed” or blended constitutional order, fascinated political theorists for another millennium. To achieve its advantages, innumerable writers from Polybius to St. Thomas Aquinas experimented with the construction of models giving to each social class the control of appropriate institutions of government.
Another very influential classifying scheme was the distinction between monarchies and republics. In the writings of Machiavelli and others, the tripartism of classical typologies was replaced by the dichotomy of princely and republican rule. Sovereignty in the monarchy or the principality is in the hands of a single ruler; in republics, sovereignty is vested in a plurality or collectivity of power holders. Reducing aristocracy and democracy to the single category of republican rule, Machiavelli also laid the basis in his analysis of the exercise of princely power for a further distinction between despotic and nondespotic forms of government. In the work of Montesquieu, for example, despotism, or the lawless exercise of power by the single ruler, is contrasted with the constitutional forms of government of the monarchy and the republic. As a result of the decline of monarchies and the rise of new totalitarian states terming themselves republics, this traditional classification is now, of course, of little more than historical interest.
Modern classifying systems
The usefulness of all the traditional classifications has been undermined by the momentous changes in the political organization of the modern world. Typologies based on the number of power holders or the formal structures of the state are rendered almost meaningless by the standardization of “democratic” forms, the deceptive similarities in the constitutional claims and governmental institutions of regimes that actually differ markedly in their political practices, and the rise of new political orders in the non-Western world. A number of modern writers have attempted to overcome this difficulty by constructing classifying schemes that give primary importance to social, cultural, economic, or psychological factors. The most influential of such schemes is the Marxist typology, which classifies types of rule on the basis of economic class divisions and defines the ruling class as that which controls the means of production in the state. A monistic typology that also emphasized the importance of a ruling class was developed by an Italian theorist of the early 20th century, Gaetano Mosca. In Mosca’s writings all forms of government appear as mere facades for oligarchy or the rule of a political “elite” that centres power in its own hands. Another classification, which distinguishes between “legitimate” and “revolutionary” governments, was suggested by Mosca’s contemporary Guglielmo Ferrero. Using a sociopsychological approach to the relations between rulers and ruled, Ferrero held that a legitimate government is one whose citizens voluntarily accept its rule and freely give it their loyalty; in revolutionary systems, the government fears the people and is feared by them. Legitimacy and leadership are also the basis of a typology developed by the German sociologist Max Weber. In Weber’s scheme there are three basic types of rule: charismatic, in which the authority or legitimacy of the ruler rests upon some genuine sense of calling and in which the followers submit because of their faith or conviction in the ruler’s exemplary character; traditional, in which, as in hereditary monarchy, leadership authority is historically or traditionally accepted; and rational-legal, in which leadership authority is the outgrowth of a legal order that has been effectively rationalized and where there is a prevailing belief in the legality of normative rules or commands. The Weberian typology has been elaborated by a number of writers who have found it particularly useful for comparing and classifying the political orders of the non-Western world.
A serviceable classification of political systems must penetrate beneath formal appearances to underlying realities; these realities, however, do not consist only of the facts of social and economic organization. Important differences often exist between political systems having very similar socioeconomic structures. That is why some sociological classifications and schemes of analysis fail as tools of political inquiry: they cannot effectively distinguish between certain societies whose political orders are full of contrasts. The political system itself must be the primary focus of inquiry and the phenomena of politics the principal facts of investigation. Such an approach may involve many different kinds of analysis, but it must begin with an examination of the ways in which power is acquired and transferred, exercised, and controlled. This is important for comparing advanced political orders and also for drawing important distinctions between regimes in the underdeveloped areas of the world.