As Frank Herbert's "Dune" (1965) begins, Duke Leto Atreides finds himself in a dangerous position. The 81st Padishah Emperor Shaddam IV has put him in control of the desert planet Arrakis, known as Dune, which is the only natural source of the all-important spice melange. The most valuable commodity in the known universe, the spice not only makes safe and reliable interstellar travel possible, but also prolongs life, protects against disease, and is used by the Bene Gesserit to enhance their abilities. The potential financial gains for House Atreides are mitigated by the fact that mining melange from the desert surface of Arrakis is an expensive and hazardous undertaking, thanks to the treacherous environment and constant threat of giant sandworms which protect the spice. In addition, Leto is aware that Shaddam, feeling threatened by the rising power and influence of the Atreides, has sent him into a trap. Failure to meet or exceed the production volume of his predecessor, the villainous Baron Vladimir Harkonnen, will negatively affect the position of House Atreides in CHOAM, which relies on spice profits. Further, the very presence of the Atreides on Arrakis inflames the long-simmering War of Assassins between House Atreides and House Harkonnen, a feud ignited 10,000 years before when an Atreides had a Harkonnen banished for cowardice after the Butlerian Jihad.