Australia, and the Cape of Good Hope was also considered important. The strategy of sea powers, according to Mahan, ought to be to deny Russia the benefits of commerce that come from sea commerce. He noted that both the Turkish Straits and Danish Straits could be closed by a hostile power, thereby denying Russia access to the sea. Further, this disadvantageous position would reinforce Russia's proclivity toward expansionism in order to obtain wealth or warm water ports. Natural geographic targets for Russian expansionism in search of access to the sea would therefore be the Chinese seaboard, the Persian Gulf, and Asia Minor. In this contest between land power and sea power, Russia would find itself allied with France (a natural sea power, but in this case necessarily acting as a land power), arrayed against Germany, Britain, Japan, and the United States as sea powers. Further, Mahan conceived of a unified, modern state composed of Turkey, Syria, and Mesopotamia, possessing an efficiently organized army and navy to stand as a counterweight to Russian expansion. Further dividing the map by geographic features, Mahan stated that the two most influential lines of division would be the Suez and Panama Canals. As most developed nations and resources lay above the North–South divide, politics and commerce north of the two canals would be of much greater importance than those occurring south of the canals. As such, the great progress of historical development would not flow from north to south, but from east to west, in this case leading toward Asia as the locus of advance. Halford J. Mackinder Halford J. Mackinder's major work, Democratic ideals and reality: a study in the politics of reconstruction, appeared in 1919.[12] It presented his theory of the Heartland and made a case for fully taking into account geopolitical factors at the Paris Peace conference and contrasted (geographical) reality with Woodrow Wilson's idealism. The book's most famous quote was: "Who rules East Europe commands the Heartland; Who rules the Heartland commands the World Island; Who rules the World Island commands the World." This message was composed to convince the world statesmen at the Paris Peace conference of the crucial importance of Eastern Europe as the strategic route to the Heartland was interpreted as requiring a strip of buffer state to separate Germany and Russia. These were created by the peace negotiators but proved to be ineffective bulwarks in 1939 (although