Eugenics

[tame_deuces]

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I think the vast majority would agree about some desirable traits.

It's defined as social philosophy, not science in wikipedia.

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That the majority agrees on it doesn't mean it holds true.

The classic example is violent behavior. Most people would agree that violent traits are undesirable. But if you somehow manage to remove most violent traits you might end up with a society that is very easy to topple from outside or within (doesn't really matter which kind of society it is so this is potentially true for all societies).

So you can't really propose a good way of bunking traits into desireables and undesireable, which topples the eugenic philosophy.

As for it being a social philosophy, that is correct. But it usually pretends to be based on scientific principle when argued for by its proponents.