Duneearned its reputation as one of the foremost sci-fi texts of the 20th century through intricate, imaginative world-building.

They are skilled fighters who can easily calculate the most efficient ways to kill an opponent.

Through the supernatural power known as the Voice, they can also utter commands that must be obeyed.

Dune

Timothée Chalamet as Paul Atreides in ‘Dune’.Chia Bella James/Warner Bros.

Fremen:The native population of the desert planet Arrakis mostly live outside the feudal system of noble houses.

They have enough on their hands just surviving in the sand.

Because of the harsh climate, Fremen culture is based around the cultivation and preservation of water.

DUNE

The spice melange as seen in ‘Dune.'.Warner Bros. Pictures

They all wear stillsuits that constantly preserve and recycle fluids like sweat and feed them back to the wearer.

When someone dies, their body’s remaining water is extracted and given to the tribe as a whole.

This reversion to an older form of hand-to-hand combat is, ironically, the result of futuristic technology.

Personal protective energy fields known as Holtzman shields protect wearers from fast-moving objects such as bullets or lasers.

These shields can only be penetrated by slow-moving weapons such as an expertly-wielded blade.

Landsraad:Despite all the spaceships, the future ofDuneis mostly a feudal one.

The governing power of the Imperium is a council of noble houses known as the Landsraad.

AsDunebegins, Duke Leto Atreides is known as one of the most admirable and popular leaders in the Landsraad.

It’s all about the spice melange.

Melange makes interstellar travel possible, though it’s not exactly fuel.

The mark of prolonged spice exposure can be seen in the eyes, which become blue-on-blue.

Fremen, who are constantly exposed to spice in their desert environment, all bear these all-blue eyes.

Mentat:ThoughDunetakes place in the far future, there are no robots or supercomputers to be found.

As a result, humans have had to make up for certain computer functions through their own ability.

Mentats are people specially trained to make high-level mathematical calculations and analyze probabilities.

Most powerful leaders have their own Mentat on hand to aid them in their decision-making.