Petroleum industry and trade Political aspects Politics and government 44 History 41 Energy policy 37 Foreign relations 36 Government policy 23 more ... World politics 16 Environmental aspects 15 Foreign economic relations 11 Petroleum 11 Geopolitics 10 Social aspects 10 Causes 9 Petroleum reserves 9 Economic aspects 8 Gas industry 8 Military aspects 8 Economic conditions 7 Power resources 7 Economic development 6 Energy consumption 6 Economic policy 5 Insurgency 5 Political corruption 5 World War, 1914-1918 5 Democratization 4 Energy development 4 Globalization 4 International economic relations 4 less ...