The birth rate probably went up: Food production improves, New agricultural technology, Rural families grow their own food (subsistence farming), Family size is a status symbol, The birth rate probably went down: Family planning / contraception, Women enjoy having careers, People enjoy money-making careers, The death rate probably went down: Government pays for health care, Smallpox eradicated, Malaria medication paid for by charities, Government pays for sewage / sanitation, New medicines and drugs discovered, The death rate probably went up: Natural disaster (flood / drought), Poor diet (e.g. , Obesity diets (e.g. Big Mac'n'Cheese), Pandemic flu (e.g. Spanish Flu/COVID-19),

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