Today: a story about defusing conflict when emotions run high, from someone who's made it her life's work. We hear from Shneaqua Purvis, better known as Coco, the founder and C.E.O. of Both Sides of the Violence in Brooklyn, New York. After losing her sister to gun violence, Coco devoted her life...

Today, we talk with Sophie Hannah, author of How to Hold a Grudge, and meditation teacher Matthew Hepburn, for perspective on what triggers our grudges in the first place – and how holding them can actually be good for us.