An extensive cross-country survey from McKinsey Health Institute suggests our relationship with social media is more complex than we thought. We’re in the midst of a youth mental health crisis and many chalk this up to the advent of social media. In a new report, McKinsey Health Institute surveyed 42,000 people in 26 different countries about their mental, physical, social, and spiritual health, and found that the connection between mental health and social media is more complex that we thought it was.