10. Klingon(97 points, on 8 of 23 lists - Top Vote #2 by Gunflyer) 
Genus: Barbarian Sapien
Klingons are a fictional warrior race in the Star Trek universe.
Klingons are recurring villains in the 1960s television show Star Trek: The Original Series, and have appeared in all five spin-off series, along with eight of the feature films. Initially intended to be antagonists for the crew of the USS Enterprise, the Klingons ended up a close ally of humanity and the United Federation of Planets in Star Trek: The Next Generation and Star Trek: Voyager. In the 1990s series Star Trek: Deep Space Nine the United Federation of Planets briefly goes to war with the Klingons. Later in the series, the two join together with the Romulans to fight the Dominion.
In comparison to The Original Series, Klingon culture is thoroughly examined in later series episodes, part of a larger movement by Star Trek writers to deepen viewer understanding of the alien races of the franchise. The Klingons adhere to a strict code of honor, similar to feudal Japanese customs. Their society is based on war and combat; ritual suicide is often preferred over living life as a crippled warrior, and may allow a warrior to die with honor. To be captured rather than killed in battle brings dishonor to not only the captive but his descendants. Death is depicted as a time for celebration, not grief.
Klingons are depicted as a spiritual people. According to their legends, Klingons slew their own gods. The equivalents to heaven and hell are called Sto-Vo-Kor and Gre'Thor, respectively; in Sto-Vo-Kor, battle and feasting can be eternally won and shared, while those sent to Gre'Thor are condemned to eternal torture unless their honor is restored by living relatives. Those who do not die in battle may not enter Sto-Vo-Kor; relatives undertake quests to guarantee their deceased comrades entry into paradise. Despite believing in an afterlife, the Klingons perform no burial rites, and dispose of corpses by the most efficient means.
The Klingon's spiritual leader is Kahless, a messianic figure who established early codes of honor and was the first Klingon emperor. His fabled weapon, the Sword of Kahless, is depicted as a unique bat'leth that serves as the Klingon equivalent of the Holy Grail. In the TNG episode "Rightful Heir", Kahless appears in the flesh to Worf, who had doubted his Klingon faith.[31] This Kahless is revealed to be a clone, created in an attempt to bring Klingons together, and who is chosen to lead the Klingon people as a figurehead.
Klingons are passionate opera lovers. The first Klingon opera on Earth performed entirely in the Klingon language is ’u’, which debuted in The Hague in September 2010.
Notable representatives:
Worf, Kodos (not that one), Kang (not that one)
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