Now that I have nothing to do on the weekends, since my truck is broken down, I've been rewatching some of my favorite videos. This is one of my favorites. It's the one I show folks who question if bigfoots might actually exist and why they behave as they do.
I doubt that, otherwise they would have beaten us to the moon. Right? Thats our brain size.
A 400 lbs Gorilla has about a 400 cc brain.
Homo Erectus had a 800 cc brain.
So I dont think its specifically correlated to body size.
Sasquatch seems to be stuck somewhere between a Gorilla and a Homo Erectus. Not flaking stone tools or making fire, but maybe using sticks for clubs. Maybe some rudimentary language?