The further development goes, the more I feel like I'm going crazy. In this case, I had to create 741 ethnic groups, and perhaps that won't be enough. This number includes the largest peoples of Africa, sub-ethnic groups of Europe, Native Americans, and so on. However, covering smaller tribes will be problematic (especially considering I also need to create a flag). So, I settled on 741. Furthermore, each of the 1,423 regions of the world has a complete ethnic composition (the top 8 largest ethnic groups + religion of each group + birth rate + death rate, etc.).
Do you think this will be enough to simulate peoples? Please try naming different peoples and we'll check if they're added to the game. We might have forgotten something important.
(If anyone is interested in the project, it's called 'Economic Miracle'. I'd appreciate a wishlist addition on Steam.)