History -- 2 Civilization 1 Description and travel 1 Foreign relations - -- 1 Guide books 1 International relations 1 International unification -- 1 more ... Law -- 1 Literature -- 1 Low-intensity conflicts (Military science) 1 National security -- 1 Pictorial works 1 Politics and government -- 1 Social life and customs 1 Sources -- 1 Terrorism -- 1 Violence -- 1 Water resources development -- 1 Water utilities -- 1 Water-supply government policy -- 1 World politics -- 1 Yearbooks -- 1 less ...