Hey hey, I'm not the only one beginning their map on the 11th hour! I like your general concept for the map. Part of my reason for going with my own "indigenous first peoples" concept was similar to what's motivating you in this map: I 'm a bit short on time and didn't want to spend tons of time thinking about the back-history here. Anyway it's a nice beginning and I look forward to seeing it progress.

Cheers,
-Arsheesh