GUNS GERMS AND STEEL EPISODE 3 SUMMARY TRIAL

Some adults even more children, pick up infectious diseases from pets, but very few evolve into something serious. That higher birth-rate of food producers together with their ability to feed more per acre led them to achieve higher population densities. The birth interval for farm people was half of hunter gatherers, around 2 years. Sedentary people by contrast are unconstrained by the problem of carrying young children, and can bear and raise many children as they can feed. She cannot afford to bear her next child until the toddler can walk fast enough. Most food production, the wheel, writing, metalworking techniques, milking, fruit trees, beer and wine production could easily spread around the large mass.ДЄ hunter gatherer mother shifting from camp can carry one child with a few possessions.

It is much easier if it is east west in the same latitude, as it is in Eurasia.

In the Americas for example, it is hard for corn in Mexico to grow in CanadaвЂ™s snow. Axis orientations affected the rate of spread of crops and livestock, and possibly that of writing, wheels and other inventions. The Americas and Africa span a great North/South distance with a huge area. On the map of the world, some continents have clear differences to others. Eurasia had 72 large mammals with 13 domesticatable species, Africa had 51 species but 0 could be domesticated, AmericaвЂ™s had 1 that could be domesticated, Australia had 0 that could be domesticated. In all of the worldвЂ™s 148 big wild terrestrial herbivorous mammals вЂ“ the candidates for domestication вЂ“ only 14 pass the test. They arose from wild ancestors offering many advantages.Дomestication animals is an ongoing co-evolutionary process rather than an event or invention. It turns out that the earliest Fertile Crescent crops, such as wheat, barley and peas domesticated around 10,000 years ago. Hence any attempt to understand the origins of the modern world must come to grips with the question why the Fertile Crescent domesticated plants and animals. Food production was the first choice of major innovations to appear in the fertile crescent. All those developments sprang from dense human populations, stored food surpluses, and feeding of nonfarming specialists made possible by the rise of food production in the form of crop cultivation and animal husbandry. Cities, writing, empires, and civilization. That area appears to have been the earliest site for a whole string of developments. One of the central facts of human history is the early importance of the Fertile Crescent. The Fertile Crescent (near Iraq, Egypt and Jordan) вЂњ History followed different courses for different peoples because of differences among peoplesвЂ™ environments, not because of biological differences among peoples themselves вЂќ вЂ“ Guns, Germs and Steel

GUNS GERMS AND STEEL EPISODE 3 SUMMARY TRIAL

For your free 7 day trial head to: Guns, Germs and Steel Summary Jared was studying bird watching in New Guinea when he came across a local politician Yali who asked the question he asked was вЂњwhy is it that you white people developed so much cargo and brought it to New Guinea, but we black people have little cargo of our own?вЂќ It was a simple question and this book is the answer.Дiamond shows us how вЂњHistory followed different courses for different peoples because of differences among peoplesвЂ™ environments, not because of biological differences among peoples themselvesвЂќ

Guns germs and steel episode 3 summary