[57] It must not be too hastily assumed. Unless we go back to ancient plots of the Guy Fawkes type (now only imitated by self-styled anarchists), the leaders of movements of political reform have rarely, if ever, organized outbursts of violence; such violence, when it occurred, has been the spontaneous and unpremeditated act of a mob. [58] _Revue de l'Ecole d'Anthropologie_, February, 1909, p. 50. [59] O. Schrader, _Reallexicon_, Art. "Keuschheit." He considers that Tacitus merely shows that German women were usually chaste after marriage. A few centuries later, Lea points out, Salvianus, while praising the barbarians generally for their chastity, makes an exception in the case of the Alemanni. (See also Havelock Ellis, _Studies in the Psychology of Sex_, Vol. VI, "Sex in Relation to Society," pp. 382-4.) [60] Thus Kaan, anticipating Krafft-Ebing, published a _Psychopathia Sexualis_, in 1844, and Casper, in 1852, was the first medical authority to point out that sexual inversion is sometimes due to a congenital psychic condition. [61] Both Forel's and Bloch's books have become well known through translations in England and America. Dr. Bloch is also the author of an extremely erudite and thorough history of syphilis, which has gone far to demonstrate that this disease was introduced into Europe from America on the first discovery of the New World at the end of the fifteenth century. [62] This attitude is plainly reflected even in many books written by men; I may mention, for instance, Frenssen's well-known novel _Hilligenlei_ (_Holyland_).