Given the question: Information: - The Grand Chessboard : American Primacy and Its Geostrategic Imperatives ( 1998 ) is one of the major works of Zbigniew Brzezinski . Brzezinski graduated with a PhD from Harvard University in 1953 and became Professor of American Foreign Policy at Johns Hopkins University before becoming the United States National Security Advisor during 1977 1981 under the administration of President Jimmy Carter . Regarding the landmass of Eurasia as the center of global power , Brzezinski sets out to formulate a Eurasian geostrategy for the United States . In particular , he writes , it is imperative that no Eurasian challenger should emerge capable of dominating Eurasia and thus also of challenging America 's global pre-eminence . Much of his analysis is concerned with geostrategy in Central Asia , focusing on the exercise of power on the Eurasian landmass in a post-Soviet environment . In his chapter dedicated to what he refers to as the '' Global Balkans '' , Brzezinski makes use of Halford J. Mackinder 's Heartland Theory . - The Carter Center is a nongovernmental, not-for-profit organization founded in 1982 by former U.S. President Jimmy Carter and his wife Rosalynn Carter through a joint-partnership with Emory University, shortly after the former's defeat in the 1980 U.S. Presidential elections. It is located in a shared building adjacent to the Jimmy Carter Library and Museum on of parkland, on the site of the razed neighborhood of Copenhill, two miles (3km) from downtown Atlanta, Georgia. The library and museum are owned and operated by the United States National Archives and Records Administration, while the Center is governed by a Board of Trustees, consisting of business leaders, educators, former government officials, and philanthropists. - Sir Halford John Mackinder PC (15 February 1861 6 March 1947) was an English geographer, academic, politician, the first Principal of University Extension College, Reading (which became the University of Reading) and Director of the London School of Economics, who is regarded as one of the founding fathers of both geopolitics and geostrategy. - Nicholas John Spykman (13 October 1893 26 June 1943) was a Dutch-American geostrategist, known as the "godfather of containment." As a political scientist he was one of the founders of the classical realist school in American foreign policy, transmitting Eastern European political thought into the United States. A Sterling Professor of International Relations, teaching as part of the Institute for International Studies at Yale University, one of his prime concerns was making his students geographically literategeopolitics was impossible without geographic understanding. ye - James Earl "Jimmy" Carter Jr. (born October 1, 1924) is an American politician who served as the 39th President of the United States from 1977 to 1981. In 2002, he was awarded the Nobel Peace Prize for his work with the Carter Center. - Zbigniew Kazimierz Brzezinski (; ; born March 28, 1928) is a Polish-American political scientist and geostrategist, who served as a counselor to President Lyndon B. Johnson from 1966 to 1968 and was President Jimmy Carter's National Security Advisor from 1977 to 1981. Brzezinski belongs to the realist school of international relations, standing in the geopolitical tradition of Halford Mackinder and Nicholas J. Spykman. After reading the paragraphs above, we are interested in knowing the entity with which 'the grand chessboard' exhibits the relationship of 'main subject'. Find the answer from the choices below. Choices: - building - english - geopolitics - library - organization - security
The answer is:
geopolitics