This is a post by Federico Arena (University of Girona).

When someone utter stereotypes like “Girls are not good at mathematics” or “Mapuches are usually drunk” we intuitively sense something wrong with what has been said. The reasons for the negative evaluation of stereotypes are linked to the varieties of harms that they may cause to the stereotyped people. Indeed, such statements often express inaccurate beliefs that are the result of the imposition to certain groups of discriminatory social relationships and inegalitarian hierarchies.