Gad Saad is Visiting Professor and Global Ambassador at Northwood University, and an expert in the application of evolutionary psychology in marketing and consumer behavior. He is the host of "The Saad Truth with Dr. Saad" podcast, and the author of several books, including "The Saad Truth about Happiness: 8 Secrets for Leading the Good Life." http://www.gadsaad.com Take ownership of your health with AG1 and get a FREE bottle of Vitamin D3+K2 AND 5 free Travel Packs with your first subscription. Go to http://drinkag1.com/joerogan This episode is brought to you by ZipRecruiter — 4 out of 5 employers who post on ZipRecruiter get a quality candidate within the first day. Try ZipRecruiter FOR FREE at http://ziprecruiter.com/rogan