20th century history 1943–1980 1 20th century 1 20th century history: c 1900 to c 2000 1 Developing countries in 20th century 1 Economic development 1 Economic history 1 Economic planning 1 Economic underdevelopment 1 Economics 1 Economy 1 General & world history 1 Growth 1 History 1 History of Poland 1 Leap 1 Leszczyński 1 Military history 1 Modernity 1 Periphery 1 Political 1 Political aspects 1 Political economy of development 1 Social & cultural history 1 anthropology 1 art history 1 asian history 1 colonial history 1 colonialism 1 cultural history 1