Peter Carroll
Peter Carroll is a representative of the movement of Chaos magic. He is the author of such books as Liber Null & Psychonaut, Liber Kaos and Psybermagick.
He is the co-founder of the Illuminates of Thanateros (IOT).
Some writings by Peter Carroll are available at Chaos Matrix: http://www.chaosmatrix.org/library/carroll.php
"As there are as many Chaos Magicians as there are Chaoists practising magic, I cannot speak for the subject in general but only for my own Chaoism and Chaos Magic.
However, if you want a one-line definition with which most Chaoists would probably not disagree, then I offer the following. Chaoists usually accept the meta-belief that belief is a tool for achieving effects; it is not an end in itself."