1.
Latitudes not Attitudes: I think this guy actually underestimates some foundational importance in terms of geography and civilization. Example the first: Eurasia runs mostly east-west, so you can easily transmit ideas along similarly hospitable climes. Africa and the Americans run north-south, meaning that culture will be divided by climate as deserts, jungles, etc split peoples up. Example the second: Europe has many, many more navigable river miles than Africa does. It's easy to get around most of Europe by boat (which until about 150 years ago was the fastest and cheapest way to move stuff), while it's almost impossible in most of Africa. So, I think he doesn't give enough importance to geography and the early forms of civilization.
But in other ways he overestimates it. The divergences between Western Europe and China in the 1800s and 1900s were not due to geography, at least not the way that he explains it. That had more to do with political and social competition, culture, and just plain luck of the draw. If anything, geographic advantages hindered Chinese gains -- they had everything they needed, why scrabble for advantage? Europeans, in a relatively poorer spot and with more capable competitors, faced a different situation.
2.
You Have No Idea How Big Africa Really Is (But This Map Does): actually yes I did have an idea thank you internet.
