How do we know who are closest genetic relatives are and why is it important?

Dr. Debra Lieberman is an evolutionary psychologist, who explains how our brains are hardwired to prevent inbreeding a pattern seen across humans and the animal kingdom. She breaks down the science behind kin detection, how humans unconsciously calculate genetic relatedness, and why evolution has designed us to reject sexual attraction to family. We also explore the moral and ethical questions surrounding incest and what crying and tears communicate from an evolutionary perspective.

We Discuss:

How animals and humans detect who their relatives are
Why your brain automatically rejects forbidden attraction
The high-level reasoning behind incest taboos
How emotions like disgust and empathy shape our instincts

Why Does Your Brain Say ‘No’ to Family Sex? - Dr Debra Lieberman