Agustín Fuentes is a professor of anthropology at Princeton University. His research focuses on the biosocial, delving into the entanglement of biological systems with the social and cultural lives of humans, our ancestors, and a few of the other animals with whom humanity shares close relations.He has written many books, but we mostly discuss his latest one, which is called "Why we believe: Evolution and the Human Way of Being;" in it Professor Fuentes examines our capacity to believe.We also talk about the effects our minds have on our bodies and health, the genesis of our belief systems, the importance of travelling and education, and the enormous influence of figures, such as Joe Rogan, on public opinion.