Dalam hubungan internasional, penguasa menengah adalah negara berdaulat yang tidak tergolong penguasa super atau penguasa besar, tetapi memiliki pengaruh yang besar atau cukup dan mendapat pengakuan internasional. Konsep "penguasa menengah" dapat ditelusuri hingga asal mula sistem negara Eropa. Pada akhir abad ke-16, pemikir politik Italia Giovanni Botero membagi dunia ke dalam tiga jenis negara – grandissime (imperium), mezano (penguasa menengah), dan piccioli (penguasa kecil). Menurut Botero, mezano atau penguasa menengah "...memiliki kekuatan dan kewenangan yang cukup untuk berdiri sendiri tanpa bantuan negara lain."[1]
Tumpang tindih
Tumpang tindih antara penguasa menengah dan penguasa besar menunjukkan bahwa tidak ada kesepakatan soal pengelompokkan ini.[2]
Banyak akademisi juga meyakini bahwa Jepang dan Jerman adalah penguasa besar karena ekonominya maju dan memiliki pengaruh global, walaupun kemampuan militer dan strategisnya terbatas.[7] Meski jarang ada akademisi yang mengakui India sebagai penguasa besar, ilmuwan politik seperti Malik Mohan dan Zbigniew Brzezinski menganggap India sebagai penguasa besar.[8][9] Jerman, Jepang, dan India juga terkadang dikelompokkan sebagai penguasa menengah.
Sejumlah ilmuwan hubungan internasional mendukung klaim bahwa Italia dan Kanada berhak mendapatkan status penguasa besar karena terlibat dalam G7.[22][23] Dalam laporan HCSS tahun 2014, Italia terdaftar sebagai penguasa besar.[24]
Layaknya penguasa besar, tidak ada kesepakatan mengenai pengelompokan penguasa menengah. Daftar manapun selalu diperdebatkan dan menjajarkan negara berukuran besar (e.g. Argentina) dengan negara berukuran kecil (e.g. Norwegia).[32] Tidak semua penguasa menengah memiliki status yang sama; beberapa di antaranya dianggap sebagai penguasa regional dan anggota G20 (e.g. Australia), sedangkan negara lainnya dapat dengan mudah digolongkan sebagai penguasa kecil (e.g. Uni Emirat Arab). Sejumlah penguasa menengah yang lebih besar juga memainkan peran penting di Perserikatan Bangsa-Bangsa dan organisasi internasinoal lain seperti WTO.
Berikut adalah daftar negara yang pernah dianggap sebagai penguasa menengah oleh sejumlah akademisi atau ilmuwan politik.
^Mehmet Ozkan. "A NEW APPROACH TO GLOBAL SECURITY: PIVOTAL MIDDLE POWERS AND GLOBAL POLITICS" Perceptions: Journal of International Affairs XI.1 (2006): 77-95
^="Europeand Sussex, both the UK and France were great powers now reduced to middle power status.
^Neumann, Iver B. (2008). "Russia as a great power, 1815–2007". Journal of International Relations and Development. 11: 128–151 [p. 128]. doi:10.1057/jird.2008.7. As long as Russia's rationality of government deviates from present-day hegemonic neo-liberal models by favouring direct state rule rather than indirect governance, the West will not recognize Russia as a fully fledged great power.
^P. Shearman, M. Sussex, European Security After 9/11(Ashgate, 2004) - According to Shearman and Sussex, both the UK and France were great powers now reduced to middle power status.
^Chalmers, Malcolm (May 2015). "A Force for Order: Strategic Underpinnings of the Next NSS and SDSR". Royal United Services Institute. Briefing Paper (SDSR 2015: Hard Choices Ahead): 2. While no longer a superpower (a position it lost in the 1940s), the UK remains much more than a ‘middle power’.Parameter |access-date= membutuhkan |url= (bantuan)
^Malik, Mohan (2011). China and India: Great Power Rivals. United States: FirstForumPress. ISBN1935049410.
^ abcdBernard Wood, 'Towards North-South Middle Power Coalitions', in Middle Power Internationalism: The North-South Dimension, edited by Cranford Pratt (Montreal, McGill-Queen's University Press, 1990).
^ abcGladys Lechini, Middle Powers: IBSA and the New South-South Cooperation. NACLA Report on the Americas, Vol. 40, No. 5 (2007): 28-33: 'Today, a new, more selective South-South cooperation has appeared, bringing some hope to the people of our regions. The trilateral alliance known as the India, Brazil, and South Africa Dialogue Forum, or IBSA, exemplifies the trend … The three member countries face the same problems and have similar interests. All three consider themselves "middle powers" and leaders of their respective regions, yet they have also been subject to pressures from the North.'
^ abDaniel Flemes, Emerging Middle Powers' Soft Balancing Strategy: State and Perspective of the IBSA Dialogue Forum. Hamburg: GIGA, 2007.
^ abcdTobias Harris, 'Japan Accepts its "Middle-Power" Fate'. Far Eastern Economic Review Vol. 171, No. 6 (2008), p. 45: 'Japan is settling into a position as a middle power in Asia, sitting uneasily between the U.S., its security ally, and China, its most important economic partner. In this it finds itself in a situation similar to Australia, India, South Korea and the members of Asean.'
^Robert W. Cox, 'Middlepowermanship, Japan, and Future World Order, International Journal, Vol. 44, No. 4 (1989), pp. 823-862.
^Soeya Yoshihide, 'Diplomacy for Japan as a Middle Power, Japan Echo, Vol. 35, No. 2 (2008), pp. 36-41.
^Charalampos Efstathopoulosa, 'Reinterpreting India's Rise through the Middle Power Prism', Asian Journal of Political Science, Vol. 19, Issue 1 (2011), p. 75: 'India's role in the contemporary world order can be optimally asserted by the middle power concept. The concept allows for distinguishing both strengths and weakness of India's globalist agency, shifting the analytical focus beyond material-statistical calculations to theorise behavioural, normative and ideational parameters.'
^Robert W. Bradnock, India's Foreign Policy since 1971 (The Royal Institute for International Affairs, London: Pinter Publishers, 1990), quoted in Leonard Stone, 'India and the Central Eurasian Space', Journal of Third World Studies, Vol. 24, No. 2, 2007, p. 183: 'The U.S. is a superpower whereas India is a middle power. A superpower could accommodate another superpower because the alternative would be equally devastating to both. But the relationship between a superpower and a middle power is of a different kind. The former does not need to accommodate the latter while the latter cannot allow itself to be a satellite of the former."
^Jan Cartwright, 'India's Regional and International Support for Democracy: Rhetoric or Reality?', Asian Survey, Vol. 49, No. 3 (May/June 2009), p. 424: 'India’s democratic rhetoric has also helped it further establish its claim as being a rising "middle power." (A "middle power" is a term that is used in the field of international relations to describe a state that is not a superpower but still wields substantial influence globally. In addition to India, other "middle powers" include, for example, Australia and Canada.)'
^ abYasmi Adriansyah, 'Questioning Indonesia's place in the world', Asia Times (20 September 2011): 'Countries often categorized as middle power (MP) include Australia, Canada and Japan. The reasons for this categorization are the nations' advanced political-economic stature as well as their significant contribution to international cooperation and development. India and Brazil have recently become considered middle powers because of their rise in the global arena—particularly with the emerging notion of BRIC (Brazil, Russia, India and China).'
^"Operation Alba may be considered one of the most important instances in which Italy has acted as a regional power, taking the lead in executing a technically and politically coherent and determined strategy." See Federiga Bindi, Italy and the European Union (Washington, D.C.: Brookings Institution Press, 2011), p. 171.
^"Italy plays a prominent role in European and global military, cultural and diplomatic affairs. The country's European political, social and economic influence make it a major regional power." See Italy: Justice System and National Police Handbook, Vol. 1 (Washington, D.C.: International Business Publications, 2009), p. 9.
^ abcdAndrew F. Cooper, Agata Antkiewicz and Timothy M. Shaw, 'Lessons from/for BRICSAM about South-North Relations at the Start of the 21st Century: Economic Size Trumps All Else?', International Studies Review, Vol. 9, No. 4 (Winter, 2007), pp. 675, 687.
^Kim R. Nossal and Richard Stubbs, 'Mahathir's Malaysia: An Emerging Middle Power?' in Niche Diplomacy: Middle Powers After the Cold War, edited by Andrew F. Cooper (London: Macmillan, 1997).
^Louis Belanger and Gordon Mace, 'Middle Powers and Regionalism in the Americas: The Cases of Argentina and Mexico', in Niche Diplomacy: Middle Powers After the Cold War, edited by Andrew F. Cooper (London: Macmillan, 1997).
^ abPierre G. Goad, 'Middle Powers to the Rescue?', Far Eastern Economic Review, Vol. 163, No. 24 (2000), p. 69.
^Peter Vale, 'South Africa: Understanding the Upstairs and the Downstairs', in Niche Diplomacy: Middle Powers After the Cold War, edited by Andrew F. Cooper (London: Macmillan, 1997).
^Janis Van Der Westhuizen, 'South Africa's Emergence as a Middle Power', Third World Quarterly, Vol. 19, No. 3 (1998), pp. 435-455.
^Eduard Jordaan, 'Barking at the Big Dogs: South Africa's Foreign Policy Towards the Middle East', Round Table, Vol. 97, No. 397 (2008), pp. 547-549.
^Flemes, Daniel, Emerging Middle Powers' Soft Balancing Strategy: State and Perspectives of the IBSA Dialogue Forum (August 1, 2007). GIGA Working Paper No. 57. DOI:10.2139/ssrn.1007692
^Gilbert Rozman, 'South Korea and Sino-Japanese Rivalry: A Middle Power's Options Within the East Asia Core Triangle', Pacific Review, Vol. 20, No. 2 (2007), pp. 197-220.
^Woosang Kim, 'Korea as a Middle Power in Northeast Asian Security, in The United States and Northeast Asia: Debates, Issues, and New Order, edited by G. John Ikenbgerry and Chung-in Moon (Lantham: Rowman & Littlefield, 2008).
^Meltem Myftyler and Myberra Yyksel, 'Turkey: A Middle Power in the New Order', in Niche Diplomacy: Middle Powers After the Cold War, edited by Andrew F. Cooper (London: Macmillan, 1997).