The idea that humans were basically retarded prior to about 1901 is a little hubristic
A young MD full of himself? I may be a bit sceptical about his know-it-all attitude.
"Hm, whom to trust, a person who went to university and follow-on education for nigh a decade, oorrrrrrrrrr.... something someone posted on Facebook that just so happens to confirm what my own ignorance told me was likeliest?"