VIDEOS:
The Prince without horns
On the planet Boazania, there are two types of Boazanians - those with horns, and those without them. The horned Boazanians form an aristocratic nobility while the hornless Boazanians are forced to work as slaves.
When the younger brother of the 123rd Emperor of Boazania has a child who's born without horns, he tries to murder him and declares that he's a "cursed child". He is eventually persuadad by his wife not to do it. To hide the shame of having an "inferior" son, his existence was kept a secret.
Example of:
Fantastic Caste System