Send in the Llama Cavalry!

I don't know about you, but I found this hypothetical situation hilarious:

If the Eurasians domesticated the horse, it must have been inevitable, right? But if the Incas had shown up in Europe in 1492 with deadly llama cavalry, and mowed down backward European infantry, I suspect modern Incan historians would have declared the horse a hopeless candidate for domestication too.

Deadly llama cavalry! I wish I was a professional economist so I could ponder these things all day.