Imagine living in colonial times, stepping off your ship and onto the new world. Out from the brush comes a tribe of people you have never seen before. They are mostly naked, wearing only the skins of animals. Their most advanced weapon is the bow and arrow. Compared to you, in your shining metal armor and with a musket in hand, they appear positively primitive. Clearly yours is the advanced race… or maybe they didn’t even have the horse until around 1600… maybe it has more to do with that.
This is why history matters when composing setting.