If one of those friendly societies itself runs into environmental problems and collapses for environmental reasons, that collapse may then drag down their trade partners.
More Quotes from Jared Diamond:
The rate of human invention is faster, and the rate of cultural loss is slower, in areas occupied by many competing societies with many individuals and in contact with societies elsewhere.Jared Diamond
The broadest pattern of history - namely, the differences between human societies on different continents - seems to me to be attributable to differences among continental environments, and not to biological differences among peoples themselves.
Jared Diamond
Population densities of farmers and herders are typically 10 to 100 times greater than those of huntergatherers. That fact alone explains why farmers and herders everywhere in the world have been able to push huntergatherers out of land suitable for farmi
Jared Diamond
I decided that now is the time to start doing the things that really interest me and I find important. It was in the 10 years of the MacArthur grant that I began working on my first book... and I began putting more work into environmental history.
Jared Diamond
Some people have much more pull than other people. But when I say that the public has ultimate responsibility, I'm not saying it in a moral sense. I'm just saying it in the sense of what is it that's really going to bring change.
Jared Diamond
Domestic animals revolutionized land transport. They also revolutionized agriculture, by letting one farmer plough and manure much more land than the farmer could till or manure by the farmer's own efforts.
Jared Diamond
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Based on Topics: Reasoning QuotesNo one invited you to this business. You invited yourself.
Eddie Foy
Indeed he knows not how to know who knows not also how to un-know.
Richard Burton
He fashions evil for himself who does evil to another, and an evil plan does mischief to the planner.
Hesiod