The varieties of political experience

According to Aristotle, States are classified into monarchies, aristocracies, timocracies, democracies, oligarchies, and tyrannies. Due to an increase in knowledge of the history of politics, this classification has been abandoned. Generally speaking, no form of government could be considered the best if the best is considered to be the one that is most appropriate under the circumstances. All States are varieties of a single type, the sovereign State.

All the Great Powers of the modern world rule on the principle of sovereignty. Sovereign power may be vested on an individual as in an autocratic government or it may be vested on a group as in a constitutional government. Constitutions are written documents that specify and limit the powers of the different branches of government. Although a Constitution is a written document, there is also an unwritten Constitution. The unwritten constitution is continually being written by the Legislative branch of government; this is just one of those cases in which the nature of the circumstances determines the form of government that is most appropriate.

Nevertheless, the written constitution is essential. England did set the fashion of written constitutions during the Civil War but after the Restoration abandoned them to be taken up later by the American Colonies after their emancipation and then France after the Revolution and the rest of Europe including the European colonies.
There are two forms of government, one a strong central government as in France and the other a local government such as the ancient divisions in England that is comparatively weaker but less bureaucratic. These two forms helped to shape the federal government, first in Switzerland, then in the United States in 1776, in Canada in 1867 and in Germany in 1870 and in the 20th century, Australia. The Federal States introduced the new principle of agreement or contract.

Compared to a federation, a confederation's singular weakness is that it lacks judicial power.[citation needed] In the American Civil War, the contention of the Confederate States that a State could secede from the Union was untenable because of the power enjoyed by the Federal government in the executive, legislative and judiciary branches.[citation needed]

According to professor A. V. Dicey in An Introduction to the Study of the Law of the Constitution, the essential features of a federal constitution are: a) A written supreme constitution in order to prevent disputes between the jurisdictions of the Federal and State authorities; b) A distribution of power between the Federal and State governments and c) A Supreme Court vested with the power to interpret the Constitution and enforce the law of the land remaining independent of both the executive and legislative branches.

Political party
A political party is a political organization that typically seeks to attain and maintain political power within government, usually by participating in electoral campaigns, educational outreach or protest actions. Parties often espouse an expressed ideology or vision bolstered by a written platform with specific goals, forming a coalition among disparate interests.
(http://en.wikipedia.org)