In the United States, criminal anarchy is the crime of conspiracy to overthrow the government by force or violence, or by assassination of the executive head or of any of the executive officials of government, or by any unlawful means. The advocacy of such doctrine either by word of mouth or writing is a felony in many U.S. states. Circa 1955, the United States Solicitor General said that forty-two States plus Alaska and Hawaii had statutes which in some form prohibited advocacy of the violent overthrow of established government.