Being able to ship chicks and other poultry has allowed people to get far more breeds than just whatever people within driving distance have. If I had to rely on driving distance, I'd probably be stuck with Wyandotte (silver or gold laced, nothing fancy), Australorp (black, again, nothing fancy) and barred rocks. Nevermind that it would be near impossible to get CX for anyone that raises themchickens for 1000s of years before USPS.