Some feminist critics argue that drag queens are misogynistic because they make women seem ridiculous and perpetuate harmful stereotypes.
But, he said, without vigilant guidance, the symbol can turn into a harmful stereotype.
The perpetuation of harmful stereotypes may exacerbate these problems.
"Promulgating the view that, for some physical reason, blacks are unable to do certain intellectual work, reinforces every harmful stereotype we've inherited over 300 years."
Fundraising by major charities for older people must emphasise both sides of the picture if they are not to reinforce harmful stereotypes.
Median tests scores for a group said nothing about individual potential, and worse, led to harmful stereotypes, she said.
These films, along with those of Foster years later, showed that African Americans were starting to fight back against harmful racial stereotypes.
Such a statement can create harmful stereotypes; there should be not a shadow of a doubt regarding the historical truth about Auschwitz.
In an introduction to the study, he wrote, "All of us must begin to understand the damage done in clinging to harmful stereotypes."