Population Theorists

Malthus

Food production grows arithmetically while population grows exponentially, therefore there will be moments when the human population is checked due to shortages in food

Neo Malthusians

Human solutions negatively modify the planet and as a result their will be shortages of space, scenery, clean air, water, food, etc. Therefore there will be moments when the human population is checked due to shortages in the above resources

Boserup

Humans are inventive and will create ways to produce more energy, space, food, water, clean air, but their may be some other consequences

Cornucopians

Humans are inventive and therefore there will always be enough energy, space, food, water, air, and scenery

Marxists

Plenty of resources the problem lies in the distribution of the resources

Positive Checks

War, Famine, Disease, Drought, etc (word)

Negative Checks

Family Planning, birth control, natural f.p., abstinence, sterilization, etc (word)

+ CHECKS

increase the death rate (sign)

- CHECKS

decrease the birth rate (sign)