The introduction of printing raised new questions. Printing did not fit into this scheme of things for several reasons. As a newly discovered art it did not properly belong to any of the known industries, which had gradually become consolidated into strong guilds. The printers, therefore, found themselves outside the recognized trade law. They were, therefore, taken in hand by the authorities until such time as their own trade organization developed. Not only was the printing trade outside the guild organizations, but it was different from them in several important principles. In the first place, it was from the beginning a machine occupation; in the second place, it involved division of labor; and in the third place, it dealt with a product entirely different from that of the other craftsmen. The dawn of the printing industry was the dawn of an age of machinery in production. The product of the printing press was not simply an article of consumption. There is no comparison between a piece of cloth or a pair of shoes and a book. The book is a source of information and enlightenment, or the reverse. It may stir men to the ecstasies of devotion or incite them to rebellion or unsettle the foundations of their religious faith. It may serve the highest interests of mankind or it may be in the last degree dangerous to the church, the state, and the individual. Obviously, to the fifteenth century mind everything called for the regulation of the industry. The fifteenth century, like those which immediately preceded it, was an age of regulation. The idea of the freedom of commerce and industry, so dear to the modern political economist, had not yet been conceived. All industry was subject to the most minute regulations partly imposed by the state and partly imposed by the guild. All the concerns of human life were subject to regulation, including even what people in different ranks of life should eat, drink, and wear. As there was no trade organization to regulate printing, of course it became immediately the subject of governmental interest.