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Whoa! Lets all keep in mind that if all the dogs in the world were gone tomorrow humans would still exist and do just fine. They are useful in some circumstances but they do not drive cars, perform heart surgery, or even talk. Lighten up guys.
Granted, dogs have limitations. So do humans.
It is a subject of debate exactly how well humans would have done, and where we might be developmentally, if our distant ancestors not participated in one of the great cross-species symbiotic relationships of all time. Some evidence shows we were partnered with dogs over 30,000 years ago. Inuits openly observe they wouldn't survive in their traditional manner without dogs. Certain desert tribes survived because they bred dogs that could run down and bring back game animals.
Given the tenuous margins of survival our distance ancestors maintained dogs very well have been the difference between modern humans making or not. It may be as simple as no domestication of dogs; no modern humans. maybe not, but it is pretty well established that without dogs human history and culture would be completely different. And likely much poorer.
We have, presumably, moved past the marginal days of the dawn of man when dogs were essential. We might get along without dogs but I'm not sure we want to.
Domestication of animals and plants has not been a one way street. Domestication of certain grasses allowed us to create modern wheat, corn, rice. But domestication changed us and the way we live. Grains gave us beer, a safe alternative to water when we didn't understand disease and germs. Having domesticated crops and something safe to drink meant we could have villages. We stopped being nomadic.
We domesticated sheep and had dogs take over their defense as they lost many of their own defense mechanisms. Hard to raise domesticated animals with wild predators around without domesticated dogs to help.
With town and steady inputs of food and water people were able to specialize and develop a knowledge base in their specialty. We got pottery and carpentry, and the basics of both knowledge and technology infrastructure. And it all started with a half-human carrying a sharpened stick and and a half-wolf that was genetically predisposed to use teamwork to hunt and to share anything they bag as a team.
In the words of "Rick" in the movie Cassablanca: "I think this is the beginning of a beautiful friendship."