Peopling our EarthPeopling our Earth

Human SocietiesHuman Societies

►Hunter GatherersHunter Gatherers►AgriculturalAgricultural► IndustrialIndustrial►Post IndustrialPost Industrial

Hunter GatherersHunter Gatherers

►Gather Natural foodGather Natural food►HuntHunt►NomadicNomadic►Small familiesSmall families►Slow growth of populationSlow growth of population►Around until about 10,000 Around until about 10,000

years before present!years before present!http://www.imageafrica.net/gallery.aspx

Agricultural SocietiesAgricultural Societies

►Beginning about 10,000 Beginning about 10,000 years ago! – Iran, Southeast years ago! – Iran, Southeast

Asia, and AfricaAsia, and Africa

►Crops are grownCrops are grown►People have specialized rolesPeople have specialized roles►Villages and cities are formedVillages and cities are formed►Corn and Potatoes important crops that Corn and Potatoes important crops that

allowed population to grow allowed population to grow exponentially!exponentially!

Agricultural Societies Agricultural Societies beginnings…beginnings…

Industrial SocietiesIndustrial Societies

► Production of food and other products done Production of food and other products done by machines! -- by machines! --

► Large amount of energy and resources are Large amount of energy and resources are required!!!required!!!

► 1700s – Industrial Revolution1700s – Industrial Revolution► Advances in Science, Agriculture and Advances in Science, Agriculture and

Medicine – Leads to people living longer!Medicine – Leads to people living longer!► MDCs – Australia, Germany, US, others!MDCs – Australia, Germany, US, others!► Industrial InventionsIndustrial Inventions

Current Current World World PopulationPopulation

► What did the text say???What did the text say???

► How many more people can we fit on this planet?How many more people can we fit on this planet?

► How many humans can Earth support without damaging How many humans can Earth support without damaging ecosystems?ecosystems?

► http://www.emc.maricopa.edu/faculty/farabee/biobk/biobookpopecol.html#Population%20Growthhttp://www.emc.maricopa.edu/faculty/farabee/biobk/biobookpopecol.html#Population%20Growth

Where is the population growing Where is the population growing the fastest?the fastest?

►MDCs – population is stabilizingMDCs – population is stabilizing

►LDCs – less predictable with many LDCs – less predictable with many populations booming! populations booming!

►Birth rate vs. Death rateBirth rate vs. Death rate

Population Population Pyramids/DemographyPyramids/Demography

►Fast growingFast growing►Slow GrowthSlow Growth►Zero GrowthZero Growth

Fast GrowingFast Growing

Most people are under 30 and have yet to reproduce! This will cause the population to grow fast when they do reproduce!!!

Slow GrowthSlow Growth

Zero GrowthZero Growth

What has caused a What has caused a decreasedecrease in in growth in the past?growth in the past?

►Disease – Plague 1350Disease – Plague 1350►WarWar►Education – Women in France 1800sEducation – Women in France 1800s►Family PlanningFamily Planning

http://www.emc.maricopa.eduhttp://www.emc.maricopa.edu

Population Policy?Population Policy?

►Sterilization – IndiaSterilization – India►One child policy – ChinaOne child policy – China►Others – contraception, forced Others – contraception, forced

abortions, killing of daughtersabortions, killing of daughters

Ecological Issues with a growing Ecological Issues with a growing populationpopulation

►Falling water tablesFalling water tables►Deforestation leading to soil erosion Deforestation leading to soil erosion

and habitat destructionand habitat destruction►Energy/resource depletionEnergy/resource depletion

►Others??Others??

What should be done?What should be done?

►The earth can only hold a finite The earth can only hold a finite number of people – How can we number of people – How can we sustain life of people on our planet?sustain life of people on our planet?