Social aspects -- Conservation of natural resources -- 1 Economic conditions -- 1 Economic development -- 1 Economic policy 1 Educational psychology 1 Equality -- 1 more ... Government policy -- 1 Income distribution -- 1 Intellect 1 Intelligence levels -- 1 Mass media -- 1 Natural resources -- 1 Nature and nurture 1 Political aspects -- 1 Quality of life -- 1 Social conditions -- 1 Social policy 1 less ...