Do you think humanity would be flying without the Wright brothers?

Yes. The Wright brothers weren't the only ones trying to develop an airplane, and they were far from the first to create a flying machine--George Cayley, a Briton, made a glider with "flappers" for power in the early 1800s. I think if the Wrights wouldn't have worked on airplanes, someone else would have figured out you can put a gasoline engine on a glider and have an airplane that can take off and land under its own power.