In 1979 a Maryland woman and her infant daughter were involved in a head-on collusion with a drunk driver—a repeat offender with two previous convictions. While Cindi Lamb and her five-and-a-half-month-old daughter Laura survived the accident, Laura was left a quadriplegic. With the help of sympathetic friends, Cindi Lamb began battling drunk driving with public awareness campaigns and efforts to strengthen drunk driving laws in her home state. A year later in California, Candace Lightner’s thirteen-year-old daughter Cari was killed by a drunk driver. Like the driver who injured Laura Lamb, Cari’s killer was a repeat offender. Fueled by grief at her daughter’s senseless death and anger at the lenient laws that allowed a driver with multiple drunk driving convictions to hold a valid driver’s license, Lightner joined...