Welcome back to The Science of Happiness. I'm Dacher Keltner, and today it's an honor to be joined by Abby Wambach. Abby's new book is an inspiration, and it's so timely today, it's called We Can Do ...

The hosts of the "We Can Do Hard Things" podcast, Abby Wambach, far left, Glennon Doyle and Amanda Doyle, have written a book examining 20 existential questions.