The world as of June 2014 has many sovereign governments. One example of a sovereign government is the United States of America.
To the best of my knowledge, there are three sovereign city states in the world today: Monaco, Singapore and the Vatican.
There are 197 sovereign countries in the world.
There are 195 sovereign states in the world today. This number includes 193 member states of the United Nations and 2 observer states: the Holy See (Vatican City) and State of Palestine.
A sovereign state is "a nonphysical juridical entity of the international legal system that is represented by a centralised government that has supreme independent authority over a geographic area." Meaning a sovereign state is a place that has a population and an independent government. America, indeed, has a population and also has an independent government thus it is a sovereign state. It is not the only place in the world with a population and government; in fact more than two hundred other nations have both a population and government, making them also sovereign nations. To answer your question, the USA is not the only sovereign state in the world.
Only if it is recognized by the United Nation
powers delegated to the national government because it is the government of a sovereign state within the world community
Sovereign nation-states
Sovereign nation-states
nation-state, which is a sovereign state with defined borders, a permanent population, and a government that has the power to make and enforce laws within its territory. Nation-states are the most common form of political organization in the world today.
The dominant political unit in the world today is the nation-state. A nation-state is a political entity defined by a contiguous territory, a unified government, and a shared cultural identity among its population. These entities are recognized as independent and sovereign under international law.
a government
The federal government taking over and controlling private industry. The government determining salary caps for people not on the federal payroll. A government that will not enforce it's own laws pertaining to border security.