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
- Peter Howard, B.A., B.S., M.A., Ph.D. Assistant Professor, School of International Service, American University (2008). "Great Powers". Encarta. MSN. Archived from the original on 2009-10-31. Retrieved 2008-12-20.CS1 maint: Multiple names: authors list (link)
- Louden, Robert (2007). "Great+power" The world we want. United States of America: Oxford University Press US. p. 187. ISBN 0195321375.
- T.V. Paul; James J. Wirtz, Michel Fortmann (2005). "Great+power" Balance of Power. United States of America: State University of New York Press, 2005. pp. 59, 282. ISBN 0791464016. Accordingly, the great powers after the Cold War are Britain, China, France, Germany, Japan, Russia, and the United States p.59
- "University of Washington Press - Books - Korea's Future and the Great Powers". www.washington.edu.
- "PINR – Uzbekistan and the Great Powers".
- Yong Deng and Thomas G. Moore (2004) "China Views Globalization: Toward a New Great-Power Politics?" The Washington Quarterly
- Friedman, George (2008-06-15). "The Geopolitics of China" (PDF). Stratfor. Retrieved 2008-07-10.
- "World powers to start work on Iran sanctions: envoys". reuters.com. Retrieved May 30, 2010.
- Canada Among Nations, 2004: Setting Priorities Straight. McGill-Queen's Press – MQUP. 17 January 2005. p. 85. ISBN 0773528369. Retrieved 13 June 2016. ("The United States is the sole world's superpower. France, Italy, Germany and the United Kingdom are great powers")
- Sterio, Milena (2013). The right to self-determination under international law : "selfistans", secession and the rule of the great powers. Milton Park, Abingdon, Oxon: Routledge. p. xii (preface). ISBN 0415668182. Retrieved 13 June 2016. ("The great powers are super-sovereign states: an exclusive club of the most powerful states economically, militarily, politically and strategically. These states include veto-wielding members of the United Nations Security Council (United States, United Kingdom, France, China, and Russia), as well as economic powerhouses such as Germany, Italy and Japan.")
- Ovendale, Ritchie (January 1988). "Reviews of Books: Power in Europe? Great Britain, France, Italy and Germany in a Postwar World, 1945-1950". The English Historical Review (Oxford University Press) 103, number 406 (406): 154. doi:10.1093/ehr/CIII.CCCCVI.154. ISSN 0013-8266. https://www.jstor.org/stable/571588.
- Heineman, Jr., Ben W.; Heimann, Fritz (May–June 2006). "The Long War Against Corruption". Foreign Affairs. Council on Foreign Relations.
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.
- Richard N. Haass, "Asia’s overlooked Great Power", Project Syndicate April 20, 2007.
- "Analyzing American Power in the Post-Cold War Era". Retrieved 2007-02-28.
- Cohen, Eliot A. (July–August 2004). "History and the Hyperpower". Foreign Affairs. Retrieved 2006-07-14.
- "Page not found". IISS.
- "Kissinger and India's Bomb". Retrieved 2009-05-23.
- Jones, Keith. "Hindu chauvinist-led coalition to form India's next government". www.wsws.org.
- "Kissinger and India's Bomb". frontline.thehindu.com.
- By Stephen P. Cohen, India: Emerging Power, p. 60
- Strategic Vision: America & the Crisis of Global Power by Dr. Zbigniew Brzezinski, pp 43-45. Published 2012.