The classic observer of human behavior would tell you all of our decisions have a rational basis. But new research indicates that “rational” may not be based on any conscious factors, but instead, is more deeply hardwired in our DNA. Vladas Griskevicius is co author of a new book called “The Rational Animal: How Evolution Made Us Smarter Than We Think.” He talks with Marcie Sillman.
Produced by Arwen Nicks.
