Yeah it is true. Agriculture allowed for a surplus of food that is unachievable in hunter-gatherer societies. With more food people settled into communities that became cities. Surplus food allowed people to focus their energies into things other than searching for food; that means because people had more time free of the search of food they could specialize in a craft. This specialization of the members in a society is called the "division of labor." In agrarian societies, instead of hunting for bison people could focus their time on becoming things like leather workers, soldiers, architects, or tool makers.

EDIT: grammar