Washington, DC is full of oldest children. This is no surprise, as “oldests” usually value power and responsibility. They are also more independent. In therapy, they tell me stories about younger siblings who just can’t get it together. They resent the time, money, and attention a brother or sister has leeched from their parents. They get tired of playing mediator during family squabbles, or solo caretaker when parents grow old.
You don’t have to be an oldest child to wonder how people who grew up in the same family can be so different from each other. But siblings aren’t born into the same families, nor do they grow up in the same family. You may have lived in the same house for many years, but each of you experienced a very different family.