The author proposes an annular model of the global geopolitical expanse – an analytical construction raised by the seeking to explain the correlation between the continental masses of Eurasia and their surroundings by virtue of: 1) developing H.J. Mackinder’s ideas of concentration of the expanses around the geographical pivot of history and of the existence of crescent-structures; 2) being guided by A.P.Karpinsky’s conceptions of concentric location of continents “obliquely relative to the meridian”; 3) taking into consideration the views of A.L. Wegener e.a. concerning the drift of the continents and the pulsatory redistribution of the continental masses of the Pangaia protocontinent and the compressing envelopment of the Pacific ocean by those masses.