He wrote the "An Essay on the Principle of Population" which talked about how population growth will inevitably exhaust world food supply.
Thomas Malthus
He wrote "The Population Bomb" wherein he argued that overpopulation bring about global disasters leading to food shortage and mass starvation.
Paul R. Elhrich
It's the economy, not the babies.
Betsy Hartman
Betsy Hartman accused governments of using population control as a "substitute for social justice and much needed reforms
such as:
• land distribution
• employment creation
• provisions for education
• health care
it suggests that populations grow along a predictable five-stage model
Demographic transition theory
death rates and birth rates are high and roughly in balance
stage 1
the death rates drop rapidly due to improvements in food supply
stage 2
birth rates fall of due to access to contraception, increases in wages, urbanization, increase in the status and education of women, increase in investment in education. Population growth begins to level off.
stage 3
birth rates and death rates are both low, creates an economic burden on the shrinking working population
stage 4
fertility rates transition to either below-replacement or above-replacement
stage 5
DTM
demographic transition model
relating to the whole world
global
the movement of people from one place to another
migration
any person who is moving or has moved across an international border or within a state away from his/her habitual place of residence
migrants
movement of people from one place to another around the world
global migration
2 types of global migration
internal migration and international migration
movement within a state of country
internal migration
movement of people from one another country to another
international migration
2 types of international migration
immigration and emigration
moving into a country of which one is not a native
immigration
leaving one's country to move to another
emigration
refers to a situation where all or the majority of intelligent, skilled or capable resources within a given field or geographic region leave the area because of various factors including lack of high-paying jobs.
Brain Drain
these pull people to come to an area
pull factors
these push people to leave an area
push factors
political pull factors of migration
democracy, freedom
social pull factors of migration
plentiful food, available services, lots of doctors
economic pull factors of migration
job opportunities, better quality of life, good pay
cultural pull factors of migration
diversity, interesting culture
political push factors of migration
persecution, war
social push factors of migration
poor services, lack of education, poor medical care
economic push factors of migration
unemployment, poor pay, hazardous working conditions