Here is a brief excerpt from an article written by Paul Ratner for the Big Think website. To read the complete article, check out all the other resources, and learn more about Big Think, please click here.

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Like a cycle that comes back around almost a thousand years later, modern terrorism has historical roots in a notorious sect of medieval assassins from Syria and Persia (modern-day Iran). In fact, the word “assassin” comes from “hashishin”, the Arabic nickname for this group’s most rabid followers, which meant “users of hashish” or “hashish addicts”. These drug-pumped young men would strike terror into the hearts of the public by killing high-profile targets to further the political goals of the sect’s masters.

The sect was comprised of Nizari Ismailis, a group that split off from Ismailisim, a branch of Shia Islam, in the end of 11th century (around 1080). The “assassins” were founded by Hassan-i Sabbah, a radical missionary, who along with other leaders of the sect came to be evocatively-nicknamed “The Old Man of the Mountain.” Over the course of several hundred years, the “hashishin” became known throughout the Middle East for killing two caliphs, many viziers, sultans and Crusader leaders.

Of course, not all Nizari Ismailis were assassins. Rather it was a portion of their followers known as the fida’i or fedayeen, meaning “those who sacrifice themselves”. The popular legend was that these well-trained young men would be pumped full of drugs like hashish, shown a promissory “paradise” garden full of virgins and sent off on a suicide mission that would allow them to return to this garden for good.

The fame of the assassins was such that it spread to Europe courtesy of Marco Polo, the celebrated Venetian world wanderer, who wrote about them in his Crusader accounts, embellishing their deeds and increasing their notoriety. In fact, stories of the “secret garden” and drugging are often attributed to Marco Polo’s writing prowess and as such debated for their historical accuracy.

Why take this approach?

Lacking numbers and an army, the leaders of the assassins realized that they needed well-trained fanatical warriors to further their political and religious goals. In particular, they initially battled against the Seljuk Empire, a Turko-Persian Sunni Muslim Empire which had a great chunk of territory under its control and actively battled the Ismailis, whom they regarded as heretical.

Hasan-i Sabbah and other assassin leaders saw that asymmetrical warfare worked in changing the leaders who opposed them and in seeding terror throughout the population. Their targets were often killed in broad daylight and in public spaces, to maximize the exposure of the act to the public. A possibly drugged assassin would suddenly appear in a marketplace and stab a well-known person through the heart with a poison-tipped dagger, an act sure to be worthy of fearful conversation. The assassins saw the elimination of leaders as a way of political discourse, a rather different tactic from the modern terrorists who see direct attacks on the population as the main operating principle.

Hasan-i Sabbah, the sect’s founder, was a remarkable man, versed in art, metaphysics, philosophy, math, astronomy and other sciences of the day. He conducted the sect’s operations from Alamut (meaning “Eagle’s Nest”), an impregnable Persian mountain fortress which is about 60 miles away from modern-day Tehran in Iran. The castle stood strong against many assaults, finally captured by the Mongols in 1256.

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Here’s a direct link to the complete article.

Paul Ratner is a writer and filmmaker. His award-winning films have played at numerous film festivals around the world. Recently, he finished directing a feature documentary about philosophy, fringe science and nuclear history, and wrote a collection of surreal flash fiction stories. He is currently working on his first novel. Paul has a penchant for history, science, philosophy and rare images. You can follow his work here on Facebook and on Twitter.