"The only things that are important in life," declared the French filmmaker Jean Renoir, "are the things you remember." But what do we remember and why? That's the subject of a new book, "Why We Remember: Unlocking Memory's Power to Hold on to What Matters," by pioneering neuroscientist Charan Ranganath. He joins us today to explain why you still know the lyrics to the song you loved in eighth grade but can't remember the name of your kid's eighth-grade teacher, how memory shapes your identity, and what you can do right now to improve your recall.

THE NEXT BIG IDEA CLUBWe all know that reading is the best investment we can make in ourselves, but figuring out what to read — well, that’s another matter. Which is why we started the Next Big Idea Club. We get the best new books (as chosen by our friends Malcolm Gladwell, Adam Grant, Susan Cain, and Daniel Pink) into the hands of curious people. Like you! Join us today at nextbigideaclub.com