I stumbled upon some tweet from a woman claiming that peanut allergies, ADHD and certain other issues (I forgot the list) weren't around in the 70s/80s
Oh, this is a very common far-right conspiracy theory (often they include things like autism, being transgender and other similar stuff). The reason why these things 'weren't around' in the 1980s is a) we often didn't have the terminology to describe them, so these things existed but nobody knew what they were, and b) even if we did have the terminology, they were stigmatised so nobody wanted to admit that they had ADHD, were autistic and so on. As social stigma decreases, more people feel comfortable identifying that they have certain disabilities or other marginalised identities.
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Oh, this is a very common far-right conspiracy theory (often they include things like autism, being transgender and other similar stuff). The reason why these things 'weren't around' in the 1980s is a) we often didn't have the terminology to describe them, so these things existed but nobody knew what they were, and b) even if we did have the terminology, they were stigmatised so nobody wanted to admit that they had ADHD, were autistic and so on. As social stigma decreases, more people feel comfortable identifying that they have certain disabilities or other marginalised identities.