Because they didn't have razor wire and chain link fence in 1776.
You should definitely enjoy the Skywalker Paradigm. Give it a look. Compellingly silly stuff, and the citations are hilarious — that also tend to inspire that little bit of curiosity that spawns more questions. 😜
What's the word for an earworm, but for headcanon, anyway? 🤔🤷🏼♂️