Finished a couple days ago. First non-fiction I've read since school other than some essays by Chomsky. The title is perfect for the book. Diamond contends that it's guns, germs, and steel which have driven some societies to success and others to extinction or near close to it. Guns covers technology. He expands on how technology comes to some societies and not to others. Germscome from the development of crops, animal domestication and larger populations. Steel covers both technology and environment that have been the reasons behind the way our last 13,000 years have panned out. Our path as a species been determined by where we were located. Diamond's theories all seem plausible to me, somebody with no education in archaeology or anthropology. The west isn't so smart, it's just standing on the shoulders of thousands of years of priledged location.
For example animal domestication has had a big impact on which regions developed and which did not. Horses were domesticated in the fertile crescent and calvary armies laid waste to millions of armies lacking horses. Imagine if the Buntu warriors of Africa had managed to domesticate the rhino! Africa's history would be quite different but rhinos don't want to co-operate.
The writing is clear and never gets too detailed for a layman. There are some humourous moments, such as the rhino idea above, that keep the mood light. Definately recommended. I will definately pick up The Third Chimpanzee and Collapse after enjoying Guns, Germs, and Steel as much as I did.