The democratization of knowledge is the acquisition and spread of knowledge amongst a wider part of the population, not just privileged elites such as clergy and academics. Libraries, in particular public libraries, and modern information technology such as the Internet play a key role, as they provide the masses with open access to information. Over the centuries, the dissemination of information has risen to an unprecedented level. The start of this process can be marked from the printing press, the purpose of which was to spread information uniformly among the masses. Today, in a digitized world, the availability of online content outnumbers the information published in books, journals, or in any print form. The printing press was one of the early steps toward the democratization of knowledge. The arrival of mechanical movable type printing in Europe in the Renaissance introduced the era of mass communication, which permanently altered the structure of society. The relatively unrestricted circulation of information and (revolutionary) ideas transcended borders, captured the masses in the Reformation and threatened the power of political and religious authorities. The sharp increase in literacy broke the monopoly of the literate elite on education and learning and bolstered the emerging middle class. Across Europe, the increasing cultural self-awareness of its peoples led to the rise of proto-nationalism, and accelerated the development of European vernaculars, to the detriment of Latin's status as lingua franca. In the 19th century, the replacement of the hand-operated Gutenberg-style press by steam-powered rotary presses allowed printing on an industrial scale. Another small example of this during the Industrial Revolution was the creation of libraries for miners in some Scottish villages in the 18th century. Information Age The Information Age is a historical period that began in the mid-20th century. It is characterized by a rapid shift from traditional industries, as established during the Industrial Revolution, to an economy centered on information technology.