In journalism and mass media, sensationalism is a type of editorial tactic. Events and topics in news stories are selected and worded to excite the greatest number of readers and viewers. This style of news reporting encourages biased or emotionally loaded impressions of events rather than neutrality, and may cause a manipulation to the truth of a story. Sensationalism may rely on reports about generally insignificant matters and portray them as a major influence on society, or biased presentations of newsworthy topics, in a trivial, or tabloid manner, contrary to general assumptions of professional journalistic standards. Some tactics include being deliberately obtuse, appealing to emotions, being controversial, intentionally omitting facts and information, being loud and self-centered, and acting to obtain attention. Trivial information and events are sometimes misrepresented and exaggerated as important or significant, and often include stories about the actions of individuals and small groups of people, the content of which is often insignificant and irrelevant to the macro-level day-to-day events occurring globally. In A History of News, author Mitchell Stephens (professor of journalism and mass communication at New York University) notes sensationalism can be found in the Ancient Roman Acta Diurna (official notices and announcements which were presented daily on public message boards, the perceived content of which spread with enthusiasm in illiterate societies). Sensationalism was used in books of the 16th and 17th century, to teach moral lessons. According to Stevens, sensationalism brought the news to a new audience when it became aimed at the lower class, who had less of a need to accurately understand politics and the economy, to occupy them in other matters. Through sensationalism, he claims, the audience was further educated and encouraged to take more interest in the news. The more modern forms of sensationalism developed in the course of the nineteenth century in parallel with the expansion of print culture in industrialized nations.