There has been a string of racially motivated crimes in recent months.

Could one of the side-effects of COVID-19 be an increase in racism?

In a very compelling study, Letendre and colleagues showed that disease threat (the increased prevalence of parasites and pathogens) was related to xenophobic and ethnocentric ideals, and those ideals translated into increased violence against out-group members. Importantly, one need not contract a disease to show the changes in ideals or behavior. 

Last year, a study by Harvard researcher Brian O’Shea and colleagues showed that individuals who live in U.S. states with higher disease rates exhibit greater unconscious and conscious racial prejudice and are more likely to endorse racist ideology.

Just as our physical immune system gets “fired up” when exposed to disease, humans and other animals have evolved a behavioral immune system that triggers anti-outgroup sentiments when disease threat is high.

The most common example of the behavioral immune system is the increase in feelings of disgust when disease pressure is high (Weinstein et al., 2018). We might be less likely to eat novel foods and avoid people who look like they could be infectious.  

While the behavioral immune system in no way excuses prejudiced ideology or behavior, the knowledge of this phenomenon might help people question and reject any ethnocentric or anti- outgroup feelings that they might be having.

Read Entire Psychology Today ArticleÂ