Roger Caillois, the French psychological anthropologist, has divided the world’s games (using that word in its broadest sense to include every form of pleasurable activity) into four broad classes, depending on the kind of experiences they provide. Agon includes games that have competition as their main feature, such as most sports and athletic events; alea is the class that includes all games of chance, from dice to bingo; ilinx, or vertigo, is the name he gives to activities that alter consciousness by scrambling ordinary perception, such as riding a merry-go-round or skydiving; and mimicry
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