Rachael Rifkin is a personal historian whose work (www.rachaelrifkin) focuses on using storytelling and similarities to bridge the gap between generations, cultures, and backgrounds. She has written for Good Housekeeping, Parents Magazine, 23andMe, Ancestry.com, MyHeritage and more. Her newsletter, Theory of Relative-ity, is about the similarities that run in families, and what we can learn from those similarities.