The black cat, also called the "wild cat" or "sabot-cat", usually with an arched back and with claws and teeth bared, is closely associated with anarchism, especially with anarcho-syndicalism. It was designed by Ralph Chaplin, who was a prominent figure in the Industrial Workers of the World (IWW). As its stance suggests, the cat is meant to suggest wildcat strikes and radical unionism. The IWW was an important industrial union and was the first American labor union to recruit and organize women and people of color, playing a critical role in the fight for the eight-hour day and in free speech fights all over the country in the early 20th century. Their most famous and influential years were from 1905 until they were largely suppressed by the Palmer Raids in 1919–1920.