The Quiet Philanthropist: John Mayer's Unlikely Crusade Against PTSD John Mayer is a refreshingly humble and dedicated advocate for veterans' health.
For the past 15 years, he has been quietly pouring millions of his own dollars into research on post traumatic stress disorder (PTSD) and related issues.
Mayer's commitment to this cause stems from a deeply personal experience. In 2008, he visited wounded warriors at Camp Lejeune and was moved by the plight of those suffering from traumatic brain injuries and PTSD.