That's racist!

[Alawen Everywhere]

Did you actually read the Diamond book, Abacab? If you did, your reading comprehension is shit.

The biggest differences were beasts of burden and the direction of trade routes. Africa and South America both have shitloads of mineral resources, but they didn't have good animals to help with physical labor and the north to south orientation of both continents made it hard to migrate with familiar crops. In contrast, Europe and Asia developed with multiple species of large domesticated mammals and the trade routes developed along longitudinal lines.