Politics and government 28 History 20 Economic conditions 19 Aboriginal Australians 17 Social conditions 12 Social life and customs 12 Economic policy 8 Antiquities 6 National security 6 Government policy 5 Public administration 5 Social aspects 5 Anthropology 4 Economic development 4 Foreign relations 4 Human ecology 4 Land tenure 4 Law and legislation 4 Archaeology 3 Armed Forces 3 Civil service 3 Civilization 3 Colonization 3 Community leadership 3 Decision making 3 Discovery and exploration 3 Economic aspects 3 Elections 3 Energy consumption 3 Ethnology 3