Psychologist Barbara L. Fredrickson is widely credited with providing some of the strongest empirical evidence that positive emotions—as subtle and fleeting as they are—drive human resilience, build enduring personal resources, and create the passion-fueled habits that define healthy lifestyles. Her work also demonstrates why certain moments of positive emotional uplift matter more than others, illuminating the very foundations of meaning, transcendence, and love. Positive Emotions presents Fredrickson's groundbreaking research, tracing the arc of her career across five successive scientific breakthroughs. Each of the book's five sections opens with Fredrickson's stories, both personal and scientific, that paved the way to each successive breakthrough. Her stories feature her mentors, her community of scientific peers, her students, her serendipitous discoveries, as well as her motivations for sharing her discoveries outside of academia for lifelong learners seeking evidence-based