My liberal mother in law says because we didn’t understand such allergies existed before now.
I am sure she thinks that. But I am pretty sure even way back in prehistoric times such as the 70s, people were not too dimwitted to notice an alarming percentage of kids going into anaphylactic shock every time a another kid unwraps a peanut butter sandwhich in the lunch room at school.
I would be willing to bet anybody over 40 in this country can recall a single kid who had peanut allergies. Well, very few anyway