Modernity, a topic in the humanities and social sciences, is both a historical period (the modern era) and the ensemble of particular norms, attitudes and practices that arose in the wake of the Renaissance—in the "Age of Reason" of 17th-century thought and the 18th-century "Enlightenment". Some commentators consider the era of modernity to have ended by 1930, with World War II in 1945, or the 1980s or 1990s; the following era is called postmodernity. The term "contemporary history" is also used to refer to the post-1945 timeframe, without assigning it to either the modern or postmodern era. (Thus "modern" may be used as a name of a particular era in the past, as opposed to meaning "the current era".)