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population size, less pressures in some countries to have children -…
population size
reproduction
total fertility rate
replacement fertility rate
mortality rate during birth
increases in undeveloped countries
density-dependent factors
disease
parasitism
competition for limited resources
infraspecific competition
immigration
emigration
individuals leavings
new residents
introduction of new diseases
Black Death in 1300s
innovations
medicine
medical care improves
Louis Pasteur
sterilization
technology
farm equipment
able to package and get food out quicker
food
pasteurized food to kill bacteria
density-independent factors
natural disater
displacement causing movement into other areas
war
Ukraine Russia conflict
social pressures/expectations
having many kids due to cultural expectations
less pressures in some countries to have children