Key Findings: The well-known "U-shape" in well-being and "hump shape" in unhappiness by age has disappeared in the U.S., U.K. and many other countries in recent years Unhappiness now declines monotonically with age rather than peaking in midlife The change is driven by a rapid deterioration in the mental health of adolescents and young adults, especially young women
Worker productivity has increased so drastically that most Millennials have already started their midlife crisis.