Grinding up stuff that would otherwise have to be chewed has been a commonplace for a long time. Parallel or prior to that, cooking until the fibers and whatnot broke down, and in the case of meat separated from the bone, was the common solution. This was made possible by the creation of tools for hunting and defense, and a settled life. That in turn led to agriculture, which became (and remains) the basis for all civilization. S’cool.
Exactly.