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Why were there so many big supporters of eugenics in the early 1900s (e.g., Tesla, Churchill), and what changed from then to now to shift views on the subject?

Sarah Jenkins
Sarah Jenkins
Lead Content Curator · Apr 3, 2026 · Updated Apr 13, 2026

The main reason eugenics fell out of favor is that the people carrying it out were worse than the people they claimed were sub-human. The things the Nazis did ended up convincing just about everybody that eugenics was something only a crazy person would believe in. Eugenics doesnt purify anything…

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The Short Answer

The main reason eugenics fell out of favor is that the people carrying it out were worse than the people they claimed were sub-human. The things the Nazis did ended up convincing just about everybody that eugenics was something only a crazy person would believe in. Eugenics doesnt purify anything, it only kills everybody else and leaves those who believe in it. When somebody does something that awful, its hard for people to accept anything related to it any more.

Analysis

Key Concepts: Eugenics, people, everybody

This explanation focuses on eugenics, people, everybody and spans 80 words across 4 sentences. The depth is typical for Human Body questions (category average: 69 words), striking a balance between accessibility and completeness.

What This Answer Covers

The explanation opens with: “The main reason eugenics fell out of favor is that the people carrying it out were worse than the people they claimed we” It then elaboratesultimately building toward a complete picture across 4 connected points.

How This Compares in Human Body

Ranked #168 of 500 Human Body questions by answer depth (top 34%). This falls in the detailed tier — above average depth. The explanation goes beyond surface-level but keeps things accessible.

Frequently Asked Questions

Is there a simple explanation for why there so many big supporters of eugenics in the early 1900s (e.g., tesla, churchill), and what changed from then to now to shift views on the subject?

The main reason eugenics fell out of favor is that the people carrying it out were worse than the people they claimed were sub-human. The things the Nazis did ended up convincing just about everybody that eugenics was something only a crazy person…

How detailed is this explanation compared to similar Human Body questions?

This is an above-average answer at 80 words, ranked #168 of 500 Human Body questions by depth. The key concepts covered are eugenics, people, everybody.

What approach does this answer take to explain there so many big supporters of eugenics in the early 1900s ?

The explanation uses root cause analysis across 80 words. It is categorized under Human Body and addresses the question through 1 analytical lens.