Not even remotely close.
No government equals no organized civilization. Yes humans like any other tribe, pod, herd, troop of animals, have “survived” for many tens of thousands of years. Disease, predators, inter-tribe warring, fires, etc.....always took their toll.
If you believe that those (now almost never) rarely discovered tribes of inbreeding, poorly nourished hunter/gatherers living in crude huts in the jungle are all that we should aspire to be, then go ahead. Strip off your clothes, abandon your computer and home, and walk (barefoot) to Africa or South America. If you survive that trek, then maybe you’re fit enough to not have a government/civilization.