However, toward the later part of this stage, the feudal system began to break down. There were more free-holders and free-tenants, living upon the land they cultivated according to their own ideas. Wheat, rye, flax, and root crops were assuming greater importance. This variety in farming and the larger fields cultivated by the individual naturally increased the products to be sold or exchanged and hence increased transportation. People who had devoted only so much of their time to spinning and weaving as was necessary to supply their own family needs, were beginning to do more, selling the excess and purchasing from others things not grown or manufactured by themselves. Thus were developed towns as centers of trade; money as a medium of exchange assumed greater importance; and a division of labor brought into being and increased the social standing of trades and professions. Thus was ushered in the Handicraft Stage of civilization. =The Handicraft Stage.=--In England this stage lasted through approximately five centuries, from 1200 to 1700. The merging of one period into another came about so gradually that a definite date can hardly be designated, and the time is so long that undoubtedly many changes occurred in the economic activities as well as in the government and literature of the people. While it is probable that merchants, middlemen who bought from one person and sold to another, had thrived throughout the earlier civilizations of Asia, Africa, and Europe, and even extended their trade to Britain, merchandising held a comparatively minor position in England until the twelfth century, when merchants became very prominent, so much so that combinations or guilds were formed by them in all the large towns for the purpose of protecting and controlling the conduct of business and, to some extent, of maintaining a monopolistic control of the trade in their particular businesses. A guild was an association or fraternity of persons engaged in the same line of business. It differed from a trade-union in that the guild was an association of masters and employees, whereas the trade-union is an association of employees only.