Mark Manson, author of The Subtle Art of Not Giving a F*ck, argues that the entire self-help industry has been selling ephemeral highs: affirmations, visualizations, the relentless pursuit of feeling good. The research doesn't support it, and more importantly, neither does lived experience.

Rachel Yehuda, a leading PTSD researcher, has spent her career uncovering the way that trauma can leave impressions on our genes, sometimes passing biological echoes of those events to the next generation.