Nothing in the comment that we are talking about indicates that "pre-1900" is referring to 1900 BCE. It sounds squarely like it's referring to 1900 AD to me. Which is why people are saying it's ridiculous.
Nothing in the comment that we are talking about indicates that "pre-1900" is referring to 1900 BCE. It sounds squarely like it's referring to 1900 AD to me. Which is why people are saying it's ridiculous.
What part of "If you moved from one place to another, you were mostly at the whims of thieves and pirates." suggests 1900 CE to you? Have you never looked at a history book?
Normally when someone says "1900" they are referring to 1900 AD. Unless BCE had already been mentioned, which here it had not. And if they were referring to 1900 BCE they normally would specifically say 1900 BCE. That's why.
And furthermore, the parent comment above the one talking about "pre-1900" was talking about modern passports. Why would anyone immediately jump from modern passports to 1900 BCE? That don't make no sense at all. Jumping to 1900 AD however, that does make sense. You see?
"Cities had guards.", "you were mostly at the whims of thieves and pirates."
What in that speaks to 1900 CE over 1900 BCE? There is evidence of pirates in both time periods, so that feature alone isn't telling. But the context doesn't end with that feature in a vacuum, does it?