The manifesto is most notable for introducing Brzezinski's "Eurasian Balkans" theory, an updated version of the earlier "Eurasian Heartland" theory introduced by British geostrategist Halford Mackinder in his 1904 essay ''The Geographical Pivot of History''.<ref>https://www.iwp.edu/wp-content/uploads/2019/05/20131016_MackinderTheGeographicalJournal.pdf</ref> Mackinder's version of this theory in turn played a significant role in the development of the foreign policies of the [[Third Reich]], [[Cold War]]-era [[United States of America|America]], and post-Cold War [[Russia]].<ref>https://www.newstatesman.com/culture/2019/01/halford-mackinder-father-geopolitics</ref><ref>https://americandiplomacy.web.unc.edu/2000/12/james-burnham-the-first-cold-warrior/</ref><ref>https://foreignpolicy.com/2016/07/27/geopolitics-russia-mackinder-eurasia-heartland-dugin-ukraine-eurasianism-manifest-destiny-putin/</ref> | The manifesto is most notable for introducing Brzezinski's "Eurasian Balkans" theory, an updated version of the earlier "Eurasian Heartland" theory introduced by British geostrategist Halford Mackinder in his 1904 essay ''The Geographical Pivot of History''.<ref>https://www.iwp.edu/wp-content/uploads/2019/05/20131016_MackinderTheGeographicalJournal.pdf</ref> Mackinder's version of this theory in turn played a significant role in the development of the foreign policies of the [[Third Reich]], [[Cold War]]-era [[United States of America|America]], and post-Cold War [[Russia]].<ref>https://www.newstatesman.com/culture/2019/01/halford-mackinder-father-geopolitics</ref><ref>https://americandiplomacy.web.unc.edu/2000/12/james-burnham-the-first-cold-warrior/</ref><ref>https://foreignpolicy.com/2016/07/27/geopolitics-russia-mackinder-eurasia-heartland-dugin-ukraine-eurasianism-manifest-destiny-putin/</ref> |