‘Herding is a really good and interesting alternative to foraging and agriculture. You domesticate some animals and then you take them on the road with you. The advantages of herding are obvious. First, you get to be a cowboy. Also, animals provide meat and milk, but they also help out with shelter because they can provide wool and leather.
The downside is that you have to move around a lot because your herd always needs new grass, which makes it hard to build cities, unless you are the Mongols.
But anyway, one of the main reasons herding only caught on in certain parts of the world is that there aren’t that many animals that lend themselves to domestication. Like, you have sheep, goats, cattle, pigs, horses, camels, donkeys, reindeer, water buffalo, yaks, all of which have something in common. They aren’t native to the Americas. The only halfway useful herding animal native to the Americas is the llama. […]
Most animals just don’t work for domestication. Like hippos are large, which means they provide lots of meat, but unfortunately, they like to eat people. Zebras are too ornery. Grizzlies have wild hearts that can’t be broken. Elephants are awesome, but they take way too long to breed.’