Race to Save the Planet  -- A PBS Video Series - Notes by Dr. McConeghy

I. The Environmental Revolution

Important points

 

  • "Hunter Gatherers" how humans lived before we learned to farm. One of the last groups of Hunter Gatherers in the world is shown.
  • Neolithic Revolution -- Hayonim cave, northern Israel, has evidence that people lived there over 10,000 years ago -- the "Natufians."
  • Ain Ghazal is a site in Jordan, a village from 9000 years ago until 7000 years ago. Why did the people leave the village?
  • Dr Alan Wrigley suggests reasons why populations grow. He visited old churches for data.
  • The modern world came from the Industrial Revolution. Agriculture and the Industrial Revolution are related. Why?
  • The Industrial Revolution happened first in northern England and southern Scotland.

 

Hunter - Gatherers
 
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Nearly the whole history of the human race consists of being hunter gatherers. It is the natural form of life for humans.

Humans started out as "hunter-gatherers" who wandered the land, looking for edible plants and trapping or catching animals to eat. For at least 100,000 years, and probably much longer than that, the hunter-gathering life style was the way all humans lived. This way of life is difficult and probably fewer than 5,000,000 people lived on the earth during this period.

The video shows one of the few remaining groups of hunter gatherers on earth, the Shom people of Botswana. These people live in the extremely isolated and remote Kalahari desert where their ancestors had almost no contact with any other humans for many thousands of years.   Alec Campbell, one of the scientists who has become their friend, says in the video "You must be completely at one with this environment to be able to live here."  The Shom people gather roots, tubers(similar to roots), seeds, fruit and nuts from a variety of plants. If they want meat, they must set traps and one family may have several traps set out at once. Because they know how to make the traps, but more important, because they know exactly where and when to put the traps, almost every day they will catch a bird or small animal and get a small amount of meat.

The traditional Shom shown in the video live far from the cities and towns of most Botswani people. They do not plant, do not work metals, keep animals, weave, bake, brew, make pottery, have mutual fund porftfolios or build permanent houses. They have no schools and do not read or write, although they have a lot of oral traditions, folklore and stories.  They are very intelligent and kind. Of course, they have to be! Anyone who is stupid, or anyone who doesn't cooperate and respect his neighbors will soon be eliminated in this kind of difficult environment -- it takes brains and mutual support to survive!

The Nation of Botswana is a very interesting place. The country has little money, but the people there have made a tremendous effort to modernize their country, and many Botswani students have come to the USA to study (some to JWU!). On the other hand, Botswana has been ravaged by AIDS, adults there have a very high rate of HIV infection and many have died of the disease. That is a tragic situation.

 

Want to Learn More that isn't in the Video?

See grey areas...

 

Neolithic?

 

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Neolithic stone tools from Greece. About 12,000 years old.

The Neolithic Period (from Neo = New and lithic = stone, for New Stone Age) began many thousands of years ago as humans learned to make better tools from stones. It began to end about 10,000 years ago when humans learned how to farm (the beginning of farming is called the "Neolithic Revolution"), began settling down into towns, and began learning new skills -- hunter gatherers continually move from place to place, so they cannot practice skills such as brewing, baking, pottery making, weaving, boat building, fishing with nets and traps, and metal work. Those skills were only developed slowly as people settled down. Villagers first learned how to work metals and tools made of copper, then bronze (copper mixed with tin), then iron replaced stone tools. Iron requires much more sophisticated metal working than copper, so it took time, but eventually people in Africa, Europe and Asia each worked out a method for working with iron.

Of course, it took a long time for all these new skills to travel around the world. Farmers in the Eastern Mediteranean area were farming 10,000 years ago, but Indians in New England only learned to farm about 1000 to 2000 years ago, and a few small groups of people around the world still exist as hunters (such as a few groups of Eskimos, a small number of isolated Amazon Indians in South America, and the last few remaining Shom and other Bushmen people of Africa -- perhaps a few 1,000s of people in all.)

Franchthi Cave. details about a cave which was continuously occupied from 20,000 years ago to 3,000 years ago, with pictures and descriptions of various things found in the cave. Evidence found by archeologists shows that during the time the cave was inhabited, humans learned how to farm and how to raise domestic animals such as sheep and goats.

Another famous site from this period is Stonehenge. We have to remember that even those these people had little technology, they weren't stupid - they were just as smart as us, or on the average, maybe even smarter, because stupid people don't survive long in tough situations!

Stonehenge in England

 

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"The Neolithic Revolution" -- the invention of farming is called the Neolithic Revolution.

When we started learning to farm, the population started to grow.

  • The Spread of Early Farming in Europe After farming was invented in the Middle East (West Asia) the idea of farming began to spread around the world. Here is an article with links to some interesting sites, including the ancient man found frozen in a glacier a few years ago!
  • Link to Catalhoyuk in Turkey one of the most famous Neolithic Archeological Sites, one of the oldest towns anywhere in the world -- occupied
  • Neolithic: A scholarly account of the Neolithic Diaspora, when humans spread out across Europe.

The Chauvet-Pont-d'Arc Cave A cave in France. In 1994 cave explorers found beautiful paintings done by Neolithic Hunter gatherers deep in the cave. The famous photo at left shows the artist's tracing of his own hand done 31,000 years ago!

 

   
Hayonim Cave.
Hayonim cave was occupied intermittently from about 200,000 years ago until almost historic times. The cave was was occupied on a "permanent" basis by the Natufian people of Neolitihic times. They lived there starting about 15,000 to 12,000 years ago. The Natufians may have settled down in the cave because the climate was changing and the drier seasons caused some of the areas around them to be less productive. They had to stay in the areas where there was more food.

  

Photograph: Dr. Ofer Bar -Yosef

 

 

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Before 10,000 years ago the Natufians gathered all kinds of food from the forests, wetlands and grasslands that surrounded the cave.

Some scholars believe that the climate became drier about 10,000 years ago and this change forced the Hunter-Gatherer people to settle down and live only in their best areas, gradually developing farming skills to supplement the food they collected.

In the video, the narrator points out that the archeologists had "a precious find of three burnt grains of barley" when they excavated the cave. This is wild grain that the people were collecting, but eventually they learned to plant and harvest it - that is, they became farmers.

Barley seed - Barley was probably the first grain intentionally grown by humans. It is easy to grow and produces a good crop of grain which is easily ground into flour. Also, wet barley ferments very rapidly -- in other words, soon after humans started harvesting barley, they probably accidentally discovered beer.

Barley was the main food grain of Europe until about year 1500 C.E. -- the folks in Europe did not have corn, and wheat was very rarely used before that time - wheat seeds are very hard, too hard to grind without windmills and water powered mills which were not available in many areas until after year 1300 C.E. or so. For that reason, bread made from wheat flour was a real luxury before that time.

Today about half of the barley grown is fed to animals and half is used to make beer and ale. In beer making, the barley seeds are moistened and allowed to start to grow. The seeds contain starch which is converted into maltose and other sugars by enzymes in the growing seed. After a day or so the seeds are roasted and ground up. That is "malt." When malt is mixed with yeasts the yeasts ferment the sugars to make alcohol. Hop plants are added for flavoring.

Eventually as climates continued to change and populations grew, the people probably had to give up hunter-gatherer life completely. By that time they were keeping herds of goats, and growing crops. From the Francthi site linked above, we have direct evidence that people started keeping sheep and goats about this time. (How do you think we could prove that the people were keeping and raising goats instead of just hunting them?)

In the video, a group of Bedouin tribespeople are shown. A few of them still live a life reminiscent of their ancient ancestors of 5000 - 10,000 years ago! The archeologist in the film makes a point that the Bedouins survive because they are very few in numbers, so they do not overcrowd the land. She says that at the ancient town at Ain Gazal, the town failed to survive because they had too many people. They used up all their resources and died out!

 

EXHIBITIONS | JORDAN | The Neolithic Village of Ain Ghazal

Ain Ghazal -- A Neolithic village -- The video makes an important point about the ruins at Ain Gazal.

 
ainghazal.gif (23542 bytes)   Plaster statues from Ain Gazal 7000 - 9000 years old.  

The village at Ain Gazal was occupied from about 9000 years ago to about 7000 years ago.   When the villagers first settled there, they knew how to make plaster and they did a very good job of building parts of their homes with plaster.

Plaster is made from limestone, a common white rock. You must dig out the limestone rock, then burn it in a big fire. This takes a lot of wood. When it has been heated and roasted, the rock must be ground to powder. That is the plaster. You combine the plaster powder with water and then it hardens to form a white, rock-like material which of course we still use today.

When the people at Ain Gazal had been there for a very long time (nearly 2000 years) they stopped making plaster and moved away. Why? 

One clue is in the hearths (fireplaces) of the village. In the oldest houses (7000BC) the floors are made of very fine plaster, skillfully shaped to form neat little round fireplaces for wood fires that held fragments of burned wood and wood ashes. They are still in good shape after 9000 years! But in the younger (5000BC) hearths -- the ones that were made shortly before the village was abandoned -- there is no wood ash. The younger floors are not plaster, but instead they are made from white rock pounded into pieces and mixed with mud. Those floors have fallen apart -- they were not true plaster. And in the hearths, the remnants of the fires and ash are from burning animal dung or waste.

 

You have to realize that this is a very important detail. No one would cook their food with a dung fire if they could get wood! And, these people were starting to be farmers. What should a farmer be doing with dung? He should be using it for fertilizer, not wasting it by burning it up in a fire! Think what that means -- they burned dung to cook their food because they had run out of wood. They didn't have any other choice.

It seems pretty likely that the Natufian village failed because the population was too large for the amount of wood, food, and resources that the people had available to them. 


Population Growth

Population first began to increase more rapidly when people settled down in villages and women began to have babies at younger ages.

People in villages generally:

  • have a more regular food supply, so their children are healthier and fewer children die.
  • "wean" (stop breast-feeding) their children at a younger age than hunter-gatherer women. Breast-feeding temporarily reduces a woman's fertility, women who are breast feeding take longer to get pregnant, but women who stop breast feeding generally get pregnant again sooner. So, when families live in villages instead of as hunter gatherrers, the women are pregnant more often, have better, more reliable food, and have more babies. The babies are healthier and survive better, so the population grows.
  • have more resources. An farm area of only 1 kilometer square(about 0.4 square miles) can grow enough food to feed 50 farmers, but in an area like the Kalahari, it may take an area of 400 square kilometers (roughly 150 square miles) for there to be wild plants and animals to feed 50 hunter-gatherers.  When populations grow, there is no longer enough land to support them if they do not farm.

So, when hunter-gatherers stop moving, their population goes up, then there are too many of them for the land to support, so they must become farmers to survive.

From about 10,000 years ago until about 200 years ago, all of our ancestors, all the people in the world were learning to be farmers.  Only a few isolated groups like the like the Shom and San, the Inuit and a few others failed to get the message.

 

 

Shifting away from Agriculture

From about 1300 - 1500 AD in Europe, some new economic systems developed which changed the way farms worked. To give a simplified explanation, what happened was this:

  • before about 1300 AD essentially all land in Europe was owned by knights and the church, but after 1300 more private individuals who were merchants and traders (not knights) started to own land.
  • when private individuals could own land, one of the first things they did was fence off the land and prevent other people from using it.  The whole process of owning, buying and selling land, and putting up fences, became known as "enclosure."
  • land that was "enclosed" was often improved by the owners. As the owners started to improve their farms, the result was that agricultural productivity became much greater. There was more food, more animals, and especially, more wool which could be sold for cash to buy up more land. 
  • Western Europe had a cultural custom which kept the population from expanding too fast -- the custom said, no one should get married until they could afford their own home. But, with much more wealth around, young people could afford their own homes sooner. After 1500 people started getting married much younger.

This is where Alan Wrigley comes in. He's the guy who went to the churches and checked out the "registers" -- the books of old birth, marriage and death records -- to see what made the population grow. In England these books were kept in every neighborhood starting in the 1530s. When Wrigley examined the Registers the main thing he found out was --

  • in the past it wasn't so much deaths which change the population. The population didn't mainly grow because fewer people are dying, or people die younger or older. Instead...
  • what does affect the population is, how young do women start having their babies?  If women start having babies at a younger age, then they are likely to have more babies, and the population grows. That's the big thing he proved.

After 1500 -  1600 AD the population of Europe was probably expanding. So, there were more people around, but fewer people were needed on the farms because the new farming methods produced more food with less labor.  The increase in population created many problems, such as a severe shortage of lumber and firewood in England. Also, there was a surplus of labor because fewer people were needed to work on the improved farms. Many country people went to the cities seeking work.

Population growth was one of the reasons why the Industrial Revolution happened in Britain. In Britain (England, Scotland and Wales), a combination of factors created a new way of life.


The Industrial Revolution

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The industrial revolution started in England, but it didn't stay there.

The Industrial Revolution started in England about 1700. (Some historians give an exact date -- 1709 in the town of Coalbrookdale -- when a man named Darby discovered how to make iron without using wood charcoal to fire the furnaces. He used "coke" or purified coal instead. This was a big deal!

Steam, Iron, Coal

Coal is a fossil rock formed from the trees and plant material of ancient forests. It is a very profitable commercial product. People needed it to heat their houses in Britain's cold climate. Some coal is near the surface of the ground, but much more is located underground, 200 or 300 feet beneath the surface. In Britain, when you dig a mine to get this coal, the mine often fills up with water which prevents the workers from reaching the coal. In 1712 they first experimented with putting a steam engine in a mine to pump out the water. The first engines were extremely inefficient, but they did work. And everyone saw that if the engines could be improved, it would be possible to tremendously increase coal production, but the engines were very expensive.

One thing that made the steam engines expensive was the cost of iron.  Iron must be "smelted" out of "ore" (rocks which have iron mixed in them.)  For many hundreds of years, blacksmiths had been melting out small amounts of iron using fires made from wood and charcoal. But in the 1600s/1700s England was running out of wood. Lack of wood made the production of iron very costly. Before Darby, you could not use coal to melt the iron ore because coal contains impurities such as Sulfur. When these impurities get into the iron, they weaken it and make it useless.

What Darby discovered was that if you heated up and partially burned the coal, the impurities would be burned off. If you included limestone in the furnace, then the limestone would absorb some of the impurities. This purified coal is "Coke" -- Coke doesn't mean the name of a drink or an illegal drug.  Coke is the purified form of coal  that you manufacture by heating up the coal without allowing it to burn. Coal which has been purified in this way is called "coke." You can't use coal to melt iron ore, but you can use coke. So, one you know how to make coke, you have an unlimited supply of cheap fuel to melt the iron ore. all you have to do is purify the coal into coke. And, there is plenty of coal, so your supply of coke is practically unlimited.

In the video, we see a man demonstrating the techniques for working iron which were developed by these early engineers. They started to make all kinds of things from iron. The famous "ironbridge" at Coalbrookdale, shown in the video was like a show-off stunt to demonstrate how good they were at making large amounts of iron. Iron was used for household utensils, machinery, and transport -- iron rails for trains which were at first pulled by horses, but then later pulled by steam-engines mounted on wagons -- the Railroad Locomotive.

When the ironmasters worked out this system, coal mining costs were greatly reduced and the amount of coal being mined tremendously increased. Cheap and abundant coal meant cheap iron, which then meant cheap machines, which meant cheap manufacturing, transport and production. The cost of making and moving many kind of goods decreased dramatically. With these advances, Britain had a huge advantage over her competitors because her technology was more efficient. Within a little more than 100 years Britain became by far the most powerful and richest country in the world.


 

Coalbrookdale - The Iron Bridge Historic Site in England is a museum preserving the place where Darby did his industrial experiments.

It took about 100 years for the British to figure out how to do make this whole system work, but by 1800 the people in the North of England and the South of Scotland were mining more coal than the whole rest of the world put together. They had the best steam engines, the best mining, the best and biggest iron production, and the best factories. They had skilled workers who had figured out how to run the system, and skilled engineers. Britain became the engineering capital of the world as inventors like James Watt and George Stephenson improved the steam engines and turned them into steam boats, railroad engines and power sources for factory machines. They had the most advanced technology and they used it ruthlessly to conquer the world.

(it is not an accident that the engineer in charge of the original TV starship Enterprise was called "Scotty" -- for about 100 years after the Industrial Revolution started, a large fraction of all the engineers in the world were Scottish! Scotland is still producing excellent engineers, but a small country with only a tiny percentage of the world's population cannot control the world for long, even with superior technology. This is a lesson for any other single country that thinks that it can rule the world.

Victoria when she became Queen in 1837

Queen Victoria of Great Britain, Empress of India, etc etc -- Born in 1819, when Britain was just one of several powerful European countries and the industrial Revolution was still in its infancy, by the time she died in 1901, Britain was by far the richest and most powerful country, and she had been the most important person in the world for over 60 years! She was so important and such a symbol of power that everyone wanted to be related to her. Her 9 children and many grandchildren were sought after as brides and husbands for all the highest nobility in the world. Czar Nicholas of Russia and Emperor Wilhelm of Germany were her grandsons. Other children were in the ruling families of Denmark, Greece, Prussia, and other European kingdoms and Princedoms.

Why did Britain succeed so dramatically? And how could Britain, a small island with only about 35 million people, less than 3% of the world's population, rule a world-wide Empire that contained nearly half-a billion people, one-third of the entire population of the Earth? That is the power of technology -- the power that one country has over others, or one person has over others, when one has technology and the other does not.

queenvic.jpg (1386 bytes) The Queen as an elderly lady about 1897 after 60 years of her reign. The richest, most powerful person in the world.

As "Super Power" Americans, we should ask ourselves, where is the British Empire now?


One of the last points that we saw in the video is a comment by biologist John Lee of Sheffield University. While walking in the hills above Manchester England, he points out how the peat plants on the hills were damaged by the smoke from the coal furnaces of the city's factories and mines. This was one of the first known cases of large scale industrial pollution.

The new cities were not clean and wonderful. On the contrary, Lee points out that the conditions were really quite awful, and he says that "the average age of death of the working people in Manchester in 1840 was 17 years."

Many other historians have pointed out that the conditions in the newly formed industrial cities of Britain in the 1830s to 1860s were terrible. The city of Manchester was described this way by a famous historian: "the new and revolutionary city of Manchester, which multiplied tenfold in size between 1760 and 1830, from 17,000 to 180,000 inhabitants, where we observe hundreds of five- and six-storied factories, each with a giant chimney by its side, which exhales a tower of black coal vapour" (Hobshawm)

Was the Industrial Revolution a source of "progress" ? or, was it a result of "progress" and problem that we had to fix?


5.  What happens next?

The Agricultural Revolution, the Industrial Revolution, and the _________ Revolution

Some people have described where we are now as the "information age."  That viewpoint might be useful for a business person in a rich country trying to decide how many computer-ignorant employees to get rid of. But it doesn't mean much to the 80% of the world's 6,400,000,000 people who are struggling to survive. It doesn't explain how people will get clean water to drink, food to eat, safe air to breath, or shelter.

The video makes a case that we headed for the "Environmental Revolution" and that it started with the Earth Day celebrations of the 1970s.  The advance that we need, according to this viewpoint, is not cheaper electronics technology, but instead a better interaction with the planet -- that we are supposed to change our attitudes about nature, love the earth, use less material, save energy. can it or will it happen?

What exactly are we going to do now?

EarthDay.Net

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