Yes, but hunting and gathering in the bush doesn't do a damn about increasing technology and getting us off this planet. All it takes is one planetary scale disaster, and we're done for.
Actually from what I've read, hunter gatherers had 8+ hours of free time per day. They weren't constantly running in fear of predators as usually thought. There was plenty of time for invention if inclined.
We're spinning our tires aiming to expatriate from the planet in lieu of a planetary scale disaster. We are better equipped to fix our own damn rock in space than to fuck up another one.
