Book Review: Guns, Germs, and Steel

I’ve recently finished reading the non-fiction Guns, Germs and Steel by Jared Diamond. In the book, Diamond applies his extensive background and strong intellect to try and explain why and how the world has developed as it has. For example: why is it the West colonised Africa instead of Africa colonising the West? Why has technological advancement been more apparent in some regions than others?

It is an informative book under-girded by substantial research and well thought-out hypothesise. I particularly appreciate how Diamond often discussed several competing academic ideas, comparing and contrasting them. Diamond deserves congratulations on his research goal and the depth of approach he takes to answer it. Though a challenging book to read due to it’s dense subject matter, I feel as though it is a condensed master class on many topics.

Spoiler alert: I’m about to dot-point his findings and reasoning as best I can summarise in a short fashion. I’ll not be caveating, so it’s true only in broad-brush terms.

  • Only some crops can be domesticated, and they were not evenly distributed in the world. Land-masses that are stretched East-West favour crop-spreading better than a North-South orientation due to lesser climate changes.
  • Only some animals are suitable for domestication (which is different to taming). On some continents the large animals became extinct before the opportunity to domesticate them. Domesticated animals provide important protein, labour (farming), transportation and military advantages.
  • The spread of crops and domesticated animals is affected mainly by climate and geography, lesser by trade. Inhospitable environments and impassable terrain provide natural barriers.
  • Agricultural societies with crops and domesticated animals produced substantially more food than hunger-gatherer societies. This means a far denser population, and some members of society are freed freed from the food-production role. This enables them to specialise: giving rise to technologies, better organisation through bureaucracies and religion and (eventually) professional military.
  • Hunter and gatherer societies were often displaced, subsumed or eradicated by agricultural societies due to their higher population (‘the weight of numbers’).
  • A denser human population in close proximity to animals develops diseases (and then immunity to them). When these people come in contact with more isolated peoples’ disease often wiped out more than were killed militarily.
  • The development of writing facilitated “political administration and economic exchanges, motivating and guiding exploration and conquest, and making available a range of information and human experience”.
  • Technology is most often iteratively developed, and seldom from a single “brilliant” person. However, a greater population with more education is likely to develop more technology.
  • All of these factors snowballed and built-upon themselves to grow the power of the state: the larger groups often overwhelmed the smaller.

A couple of other interesting points Diamond mentioned:

  • Environment plays a huge factor. “In ancient times, however, much of the Fertile Crescent and eastern Mediterranean region, including Greece, was covered with forest. The region’s transformation from fertile woodland to eroded scrub or desert has been elucidated by paleobotanists and archeologists. Its woodlands were cleared for agriculture, or cut to obtain construction timber, or burned as firewood or for manufacturing plaster. Because of low rainfall and hence low primary productivity (proportional to rainfall), regrowth of vegetation could not keep pace with it’s destruction, especially in the presence of overgrazing by goats. With the tree and grass cover removed, erosion proceeded and valleys silted up, while irrigation agriculture in the low-rainfall environment led to salt accumulation.”
  • Political decisions have ramifications. “The end of China’s treasure fleet gives us a clue. Seven of those fleets sailed from China between AD 1405 and 1433. They were then suspended as a result of a typical aberration of local politics that could happen anywhere in the world: a power struggle between two factions of the Chinese court (the eunuchs and their opponents). The former faction had been identified with sending and captaining the fleets. Hence when the latter faction gained the upper hand in a power struggle, it stopped sending fleets, eventually dismantled the shipyards, and forbade oceangoing shipping. The episode is reminiscent of the legislation that strangled development of public electric lighting in London in the 1880s, the isolationism of the United States between the First and Second World Wars, and any number of backward steps in any number of countries, all motivated by local political issues. But in China there was a difference, because the entire region was politically unified. One decision stopped fleets over the whole of China. That one temporary decision became irreversible, because no shipyards remained to turn out ships that would prove the folly of that temporary decision, and to serve as a focus for rebuilding other shipyards.”
  • The modern keyboard layout was actually designed to be inefficient. Originally for typewriters where too much typing speed meant the typewriter would jam. Faster keyboard layouts exist, but the current layout is so ubiquitous that we are resistant to change.
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