Mainstream political scientists look slightly askance at the subset of geopolitics. They regard geopoliticians much as mainstream economists regard the so-called “gold bugs,” who persist in believing in the eternal value of gold as a medium of exchange and who place their faith in the old constants which they are sure will inevitably reappear. Similarly, the geopoliticans, an exotic subculture within the expert community, believe that despite lofty principles and progress, the mean — strategic conflict over land — will always prevail. Sometimes, they are right. The Foundations of Geopolitics sold out in four editions, and continues to be assigned as a textbook at the General Staff Academy and other military universities in Russia. “There has probably not been another book published in Russia during the post-communist period which has exerted a comparable influence on Russian military, police, and statist foreign policy elites,” writes historian John Dunlop, a Hoover Institution specialist on the Russian right.
via https://foreignpolicy.com/2016/07/27/geopolitics-russia-mackinder-eurasia-heartland-dugin-ukraine-eurasianism-manifest-destiny-putin/