Pediatrician -

After a personal tragedy involving his son, he successfully campaigned for mandatory back-up cameras in all new cars to prevent similar accidents.

One Tuesday afternoon, Leo, a five-year-old with a superhero cape and a very serious scowl, sat on the exam table. He was there for his kindergarten boosters, and he was ready for battle. pediatrician

As Leo marched out, feeling ten feet tall, his mother lingered by the door. "Thank you, Elena," she said softly. "He’s been having nightmares about this all week." After a personal tragedy involving his son, he

"I have a force field, Dr. Elena," Leo informed her, crossing his arms tightly. "No pokes allowed." feeling ten feet tall

Author of The Common Sense Book of Baby and Child Care , he revolutionized parenting in the 20th century.