Population Attitudes 1 Birth intervals 1 Civilization 1 Communicable diseases 1 Death 1 End of the world 1 mere ... Epidemics 1 Extinction (Biology) 1 Fertility, Human 1 Finance, Public 1 Forests and forestry 1 History teachers 1 Human experimentation in medicine 1 Human rights workers 1 Infertility, Male 1 Interpersonal relations 1 Murder 1 Politics and government 1 Pregnant women 1 Tariff 1 Twenty-first century 1 Undertakers and undertaking 1 Widows 1 mindre ...