Metropolitan areas Cities and towns 25 City planning 14 Sociology, Urban 12 Growth 11 Urbanization 10 Regional planning 9 History 8 City and town life 6 Globalization 6 Suburbs 6 Urban policy 5 Economic aspects 4 International economic relations 4 Social conditions 4 Urban economics 4 Economic conditions 3 Land use 3 Metropolitan government 3 Strategic aspects 3 Urban warfare 3 Addresses, essays, lectures 2 Human security 2 Inner cities 2 Internal security 2 Low-intensity conflicts (Military science) 2 Political violence 2 Public spaces 2 Social aspects 2 Urban violence 2