In the three-minute video below, Kate Pickett talks about why life life expectancy, happiness, and the variable that links them, stress, aren’t strongly related to national income averages within different developed countries.

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Lisa Wade, PhD is an Associate Professor at Tulane University. She is the author of American Hookup, a book about college sexual culture; a textbook about gender; and a forthcoming introductory text: Terrible Magnificent Sociology. You can follow her on Twitter and Instagram.