A great power is a nation or state that is able to influence other states in most of the world. That is possible because it has great economic, political and military strength. Its opinions are taken into account by other nations before taking diplomatic or military action. Characteristically, they have the ability to intervene militarily almost anywhere. They also have soft, cultural power, and often economic investment in less developed countries. There is no definite list, but five great powers are permanent members of the United Nations Security Council and eight are in G8.
The world's great powers as of the early 21st century are:
- Italy 
- United Kingdom
- United States
Potential Great PowersEdit
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Ben W. Heineman, Jr., and Fritz Heimann speak of Italy as a major country or 'player' along with Germany, France, Japan, and the United Kingdom.
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