system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] Where are all the aliens in the Galactic Empire? All the officers are human, the Stormtroopers are human clones, there's no alien representation in the fleet at all. Is the Empire racist?
gpt
The Empire is a human superiority government. In one legend, Count Dooku was a human supremacist, and part of the Clone Wars was to divest many alien governments of their wealth and have it all come under a supreme central human authority. 

Stormtroopers are not all clones, as some are conscripts to support the Imperial war machine and garner public favor through loyal service. Most alien species are regarded poorly by Imperials, and Grand Admiral Thrawn is one of the few to rise to such a rank given his species.