History of the World (board game) the number of armies it gets, its capital or starting location in parentheses, and the seas it can navigate in parentheses. Each epoch there is a minor empire and a kingdom that can be played as event cards, and these are listed at the bottom of the epoch. History of the World (board game) History of the World (often abbreviated HotW) is a board game designed by Ragnar Brothers and originally published in 1991. It is played by up to six different players in seven different epochs; each player playing a different empire in each epoch. The first edition of
Category of small categories Category of small categories In mathematics, specifically in category theory, the category of small categories, denoted by Cat, is the category whose objects are all small categories and whose morphisms are functors between categories. Cat may actually be regarded as a 2-category with natural transformations serving as 2-morphisms. The initial object of Cat is the "empty category" 0, which is the category of no objects and no morphisms. The terminal object is the "terminal category" or "trivial category" 1 with a single object and morphism. The category Cat is itself a large category, and therefore not an object of itself.