Why this word is great
CASTEISM — [Noun] Discrimination or prejudice based on a person's hereditary caste. From caste (from Portuguese casta, "breed, lineage") + -ism (denoting a system or ideology). Unlike "classism" (which stratifies by wealth or status) or "racism" (which divides by phenotype or ancestry), casteism enforces an immovable hierarchy, a birthright of oppression or privilege. It is the well that dries when an "untouchable" approaches, the wedding invitation rescinded upon discovering a surname, the silent arithmetic of a landlord weighing purity against rent—a system so ancient it mistakes itself for nature.