When some people say advanced they mean at least roman level civilization, cities with hundreds of thousands of people etc. Some of them mean things like space-

When some people say advanced they mean at least roman level civilization, cities with hundreds of thousands of people etc. Some of them mean things like space-faring level advanced. https://www.reddit.com/r/AlternativeHistory/comments/ed5gd1/a_species_with_amnesia/ https://www.reddit.com/r/AlternativeHistory/comments/ed5gd1/...