33° Mason, Aleister Crowley would definitely get some votes in the "most wicked man who ever lived contest" and is the clear cut favorite for the title of "The Father of Modern Satanism".  Crowley's wicked life and his intimate association with Freemasonry are both well known.

 Crowley himself was terribly decadent.  A happily heroin-addicted, bisexual Satan worshiper, he asked people to call him "The Beast 666."  Crowley believed that he was literally the antimessiah of the apocalypse.

During the first World War, Crowley transferred his activities to America. The press proclaimed him "the wickedest man in the world." He also spent time in Italy, but was expelled because Italian authorities accused his disciples of sacrificing human infants in occult rituals. According to one source, Crowley resided in the Abbey of Thelema near Cefalu Sicily, and revived ancient Dionysian ceremonies.  During a 1921 ritual, he induced a he-goat to copulate with his mistress, then slit the animal's throat at the moment of orgasm.

WAS ALEISTER CROWLEY JUST A 'CLOSET' FREEMASON?

Aleister Crowley was very proud of all his accomplishments and connections.  He bragged about all of the Masonic medals and insignia that he was entitled to wear.

This view was confirmed when The Arcane Schools of John Yarker came to me for review.  I wrote to the author, who recognized my title to the 33° and conferred on me the grades of 95° Memphis and 90° Mizraim. It seemed as if I had somehow turned a tap.  From this time on I lived in a perfect shower of diplomas, from Bucharest to Salt Lake City.  I possess more exalted titles than I have ever been able to count.  I am supposed to know more secret signs, tokens, passwords, grand words, grips, and so on, than I could actually learn in a dozen lives.  An elephant would break down under the insignia I am entitled to wear.

 Here we see 33° Aleister Crowley in all of his Masonic regalia:

 PAST GRAND MASTER ALEISTER CROWLEY

FRATER SUPERIOR BAPHOMET XI° 

CROWLEY'S DOCTRINE

            We find in the next quotes, the 'doctrine' of Aleister Crowley from MAGICK in Theory and Practice, by The Master Therion (Aleister Crowley):

But the bloody sacrifice, though more dangerous, is more efficacious; and for nearly all purposes human sacrifice is the best.

The animal should therefore be killed within the Circle, or the Triangle, as the case may be, so that its energy cannot escape.  An animal should be selected whose nature accords with that of the ceremony--thus, by sacrifcing a female lamb one would not obtain any appreciate quantity of the fierce energy useful to a Magician who was invoking Mars.  In such acase a ram would be more suitable.  And this ram should be virgin--the whole potential of its original total energy should not have been diminished in any way.  For the highest spiritual working one must accordingly choose that victim which contains the greatest and purest force.  A male child of perfect innocence and high intelligence is the most satisfactory and suitable victim.

 From The Book of the Law, by Aleister Crowley:  

With my Hawk's head I peck at the eyes of Jesus as he hangs upon the cross......

There is no law beyond Do what thou wilt.

From SATANIC EXTRACTS, by Aleister Crowley:

 The Oath of Fealty

I bind my blood in Satan's hands,

All this that lieth betwixt my hands

To thee, the Beast, and thy control,

I pledge me; body, mind, and soul.

                                      Pledge

 I swear to work my Work abhorred,

Careless of all but one reward,

 The pleasure of the Devil our Lord

    ALEISTER CROWLEY WAS AN INTERNATIONAL MASON

Crowley was truly an international Mason.  He received his 33° in Mexico City and spoke of participating in Masonic rituals in the United States and also was involved in other rites of Freemasonry.  Not only was Crowley a 33° Grand Inspector General of Scottish Rite Freemasonry, but he was also involved in other rites of Freemasonry that went even deeper into the occult.  The Rite of Memphis contained Masonic rituals with a definite Egyptian flavor.

By the end of 1910, thanks to my relations with the Grand Hierophant 97° of the Rite of Memphis (a post held after his death by Dr. Gerard Encausse ['Papus'], Theodor Reuss ['Merlin'], and myself),  I was now a sort of universal inspector-general of the various rites, charged with the secret mission of reporting on the possibility of reconstructing the entire edifice, which was universally recognized by all its more intelligent members as threatened with the gravest danger.

Even for a man like Crowley who was obsessed with the occult, the rituals of Freemasonry provided a profound occult thrill.

I supposed myself to have reached the summit of success when I restored the Secret Word of the Royal Arch.  In this case, tradition had preserved the Word almost intact.

Were Aleister Crowley and his followers or perhaps a similar group capable of performing acts and rituals that are comparable to what are described by satanic ritual abuse survivors.  The following quotes are from a book entitled, Secrets of the German Sex Magicians.  This book talks about the ritual use of pain and attributes to Crowley the most perverted of practices such as bestiality and the ritual consumption of body fluids.

The ritual use of pain and agony as an access mode to trance and magical power does have its limits, though.  For one thing, physical pain tends to dull the senses in the long run, so that stimuli have to be increased incessantly.  This  may quite easily lead to grave bodily harm, not to mention the fact that it can become downright addictive and lead to a kindled frenzy not very easily mastered.

Crowley, in fact, trod in his practice a path similar to that of the more materialistic authorities. Although he positively encouraged ejaculatory orgasm in his sex magic, he always made a point of consuming what he called the "elixir" afterwards.  He understood this elixir to be the mixture of the sexual fluids of both partners or, in the masturbatory act, as just the semen.  He entered very carefully in his the magical diaries a description of the elixir's consistency and taste, and he even recorded the prophecies which he deduced from these data.

And Crowley's practices go on to be even more disgusting.       

Coprophagia, which means consumption of excrement, here also includes consumption of other secretions such as urine and sweat.  It was ritually practiced from early times on the sympathetic-magic principle that the secretions of any entity contain part of its magis.  Crowley, for example, occasionally offered his disciples in Cefalu the excretement of a goat. This frequently met with no small disapproval!

Crowley performed a similar ritual in his Sicilian Abbey of Thelema, during which his Scarlet Woman was to be mounted by a goat which would be beheaded during the climax.

There exists today a secret society that dedicates itself to carrying on the teachings of Aleister Crowley.  This group is called the O.T.O..  The O.T.O. was founded earlier this century by high grade Austrian Freemason Karl Kellner and German Freemason Theodor Reuss.  The O.T.O. became a major force in the occult world when Aleister Crowley became its leader.

Crowley learned ritual magic from the man who was renown as the master of his day, MacGregor Mathers.  The pupil-student relationship soon turned into a bitter rivalry and resulted literally in a Black Magic war.  When Mathers died in 1918 many of his friends were convinced that Crowley was responsible for his death.  Mathers, also a Freemason, introduced Crowley to an occult organization called the "Golden Dawn" and helped Crowley along his dark walk on the Egyptian Masonic road.