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date:: [[2023-01-06]]
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# [[Caste by physical characteristics]]
This form describes a social caste or hierarchy based on physical appearances.
## Examples
### Eye color
- In [[sources/Book/Dune]], an addiction to and consumption of spice results in blue-on-blue eyes, so those with blue eyes are considered by the non-Fremen residents of Arrakis to "have gone native".
![[readwise/Books/Dune#^9994b8]]
- In [[The Way of Kings]], "light-eyes" are nobleborn and "dark-eyes" are the working class.
### Beauty
- In [[Book/Uglies]], everyone undergoes surgery when they come of age and given a number that assesses both their beauty as well as their standing in society.
### Gender
- In [[We Set the Dark on Fire]], women are not only assigned different roles from men but are also encouraged to fall under one of two stereotypes: the *Primera* is the "useful", cold, and rational one and the *Segunda* is the beautiful idiot. Each man in this world has both.