Murray Bookchin was an American anarchist and libertarian socialist author, orator and political theoretician. He was a leading theoretician and tactician of nonviolence within the Civil Rights Movement. An extremely famous case was that of Alan Turing, a British mathematician and theoretician. He was also an Indologist, a Marxist theoretician, and a creative writer. He is also a music theoretician and film critic. He delved into books by Indian intellectual and Communist theoretician M. N. Roy. Blavatsky was the leading theoretician of the Theosophical Society, responsible for establishing its "doctrinal basis". In forcing Knigge out, Weishaupt deprived the order of its best theoretician, recruiter, and apologist. She was married to Gene Dresselhaus, a well known theoretician, discoverer of the Dresselhaus effect. He has been described as a "brilliant intellectual and party theoretician". Balasingham became the LTTE's theoretician and chief spokesman. Chief among them was Rosa Luxemburg, the leading theoretician of the movement. Wilber emerged as a leading figure and major theoretician of the field. He later migrated to Britain, where he became the chief theoretician of the LTTE. While not a brilliant theoretician, Bock was a highly determined officer.