Stephanie Coontz: What is an addiction, and where should we draw the line? She says that for every disorder there's a list of symptoms. And in fact, it's possible to have non overlapping symptoms, she adds. But most of the psycho pathologies are really more a matter of degree than a matter of kind," writes Coontz.
Where’s the line between an addiction and a bad habit? Why do definitions of mental illnesses change over time? And what’s the most addictive thing in the world?