By this logic probably 1/3 of literature is going to have to be banned or edited. Using 'light' for 'good' which mostly derives from daylight, the sun, daytime

By this logic probably 1/3 of literature is going to have to be banned or edited. Using 'light' for 'good' which mostly derives from daylight, the sun, daytime etc. and darkness for 'bad' etc. might be the most ancient human metaphor, probably dating back to the time we could tell stories. Our first religion, in Egypt, the Sun was God and the God of the 'Dark Underworld' was the bad guy. Moreover, it doesn't really have connotation with respect to skin colour. The important, 'hard' part to social activism is context and nuance and also to understand that not all actions which may have some threadbare logic make sense or actually help.