not human history, but horse history there has. we use to have millions of them doing farming, mail delivery, travel etc, pulling equipment etc. now they no longer are needed. The horses have been put out to pasture by the invention of the engine, car, gas powered etc etc. Now they are coming for the low hanging fruit of driving, trucking, and dealing with humans on the phone. It won't happen over night but it will happen. It will be cheaper then insurance for drivers, they won't make as many mistakes, will drive through the night, etc. once it is to a spot some freckled and pimpled faced teenager can unload the back and scan what they need from it, then its off to another destination..