I never expected to hit and kill a teenager as I drove home one night. I wasn’t found at fault in the crash, but my sorrow has always been very deep. And so, wanting to honor the young man I hit, I’ve begun telling my story of bringing death in everyday life, to encourage other drivers to be as careful as they can and support safety measures like bike lanes and cellphone restrictions. “Please don’t be me,” I always say. “Please don’t take the chance of killing someone behind the wheel--drive kindly, not just defensively.” About 40,000 American die in crashes every year, and millions more are injured--tragic statistics that can feel overwhelming. But I’m determined to do whatever I can, in talks and writings and personal encounters. I never expected this to be my life’s work, but it feels absolutely right.