aeldari

A Warhammer 40k race that can be simply defined as:

Space-elves with a superiority complex that nearly went extinct due to said superiority complex.

But can be more accurately defined as:

A race highly superior to humans - referred to by Aeldari as Mon-Keigh - that are elf-like in nature and experience everything - senses, emotions, etc. - in much higher definition. It was by this that they became complacent and sunk lower and lower into debauchery. This debauchery birthed a Chaos goddess, Slaanesh, who wiped out their great empire.

"Hey man, are those elves?"
"No, those are Aeldari, they're superior to humans in every possible way."