Autocracy-
government in which one person has uncontrolled or unlimited authority over others; the government or power of an absolute monarch.
Constantinople was able to survive due to its <em>strategic</em> location and <em>sofisticated</em> system of fortifications.
Constantinople was able to survive as the <em>central</em> hub of the European culture throughout the early 1000s due to its strategic location, the city was located in a strait between the Black and Mediterranean Seas, between Europe and Asia, which allowed the city to be prevented from many invaders, from Hunes to Arabs.
In addition, the city counted with a sophisticated system of fortifications which made impossible any attempt of siege until the appearance of first developments on modern artillery in the 15th Century, and the city was well communicated with the most important nations in Eastern and Western Europe by sea (i.e. Italy, Carolingian Empire, Kiev' Rus), of which the city may receive reinforcements in desperate situations.
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Assuming your talking about Europe. At the bottom of the system there are Peasants, the lowest and most common. They work on fields and trade and barter. Next are knights. They protect the Peasants and Nobles. They usually get paid in gold or the Peasants goods. Next are Nobles, the rich. They buy Knights to protect them and are right below the king. They usually hire Peasants to work on their land for little pay. Lastly the king. They control everything. They have knights and Nobles and oversee everyone.
Nativism is the political policy of promoting the interests of native inhabitants against those of immigrants. However, this is currently more commonly described as an immigration restriction position. In scholarly studies nativism is a standard technical term. The term is typically not accepted by those who hold this political view
The Articles of Confederation created a national government composed of a Congress, which had the power to declare war, appoint military officers, sign treaties, make alliances, appoint foreign ambassadors, and manage relations with Indians. ... In addition, Congress could not draft soldiers or regulate trade.