History 24 Economic conditions 15 Economic aspects 12 Agriculture 9 Salt industry and trade 7 Social conditions 6 Industries 5 more ... Migration, Internal 5 Rural conditions 5 Roads 4 Secret societies 4 Valuation 4 Agriculture and state 3 Cadastres 3 Economic policy 3 Eminent domain 3 Finance, Public 3 Land value taxation 3 Rural development 3 Banks and banking 2 Brotherhoods 2 Cities and towns 2 Farms 2 Filicide 2 Food supply 2 Land use 2 Landlords 2 Power (Social sciences) 2 Qing Dynasty (China) 2 Railroads 2 less ...