Brad Aronson’s life changed in an instant when his wife, Mia, was diagnosed with leukemia. After her diagnosis, Brad spent most of the next two and a half years either by her side as she received treatment or trying to shield their five-year-old son, Jack, from the worst of Mia’s illness. Amid the stress and despair of waiting for the treatment to work, Brad and Mia were met by an outpouring of kindness from friends, family, and even complete strangers.

Inspired by the many demonstrations of “humankindness” that supported their family through Mia’s recovery, Brad began writing about the people who rescued his family from that dark time, often with the smallest of gestures. But he didn’t stop there. Knowing that simple acts of kindness transform lives across the globe every day, he sought out these stories and shares some of the best ones here.

In HumanKind, you’ll meet the mentor who changed a child’s life with a single lesson in shoe tying, the six-year-old who launched a global kindness movement, the band of seamstress grandmothers who mend clothes for homeless people, and many other heroes.