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Speaking of Psychology

How the threat of disease has shaped human behavior, with Mark Schaller, PhD

Speaking of Psychology

Kim Mills

Health & Fitness, Life Sciences, Science, Mental Health

4.3 • 781 Ratings

🗓️ 24 March 2021

⏱️ 30 minutes

🧾️ Download transcript

Summary

The COVID-19 pandemic is a grim reminder that infectious diseases have been a danger throughout human history–so much so that the threat of infection has actually helped shape human evolution. Disgust, wariness of strangers, cultural norms around food and cleanliness–all of these behaviors may have evolved at least in part to keep us safe from infectious disease. Researchers call this suite of protective mechanisms the behavioral immune system. University of British Columbia psychologist Mark Schaller, PhD, who coined that phrase, discusses the origins of the behavioral immune system and how behaviors that evolved to protect us from diseases may not be suitable for the threats we face today. We’d love to know what you think of Speaking of Psychology, what you would change about it, and what you’d like to hear more of. Please take our listener survey, visit www.apa.org/podcastsurvey. Links Mark Schaller, PhD Music Minimalist Piano w/ Cello by tyops via Freesound.org Freesound.org Learn more about your ad choices. Visit megaphone.fm/adchoices

Transcript

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0:00.0

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0:03.4

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0:27.6

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0:29.6

Although we are currently in the midst of a global pandemic,

0:34.6

we should not forget that we are fortunate to live in a time where we have

0:38.4

vaccines and other public health measures we can take to avoid illnesses such as polio, smallpox,

0:44.6

cholera, even bubonic plague. And we hope that soon COVID-19 will be vanquished by vaccines.

0:50.6

But for our ancestors, infectious diseases were a constant danger, so much so that

0:56.2

the threat of infection has actually helped shape human evolution. Disgust, wariness of strangers,

1:02.5

cultural norms around food and cleanliness, all of these behaviors may have evolved, at least

1:08.4

in part, to keep us safe from infectious disease.

1:11.6

Researchers call this suite of protective mechanisms the behavioral immune system.

1:16.6

But are the defenses that humans evolved thousands of years ago to ward off infection

1:21.6

suitable to protect us from the diseases we face today?

1:24.6

Do they do more harm than good in some cases? And what is the role

1:28.8

of disgust in keeping us safe and healthy? Welcome to Speaking of Psychology, the flagship

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