This year I am feeling haunted by one of the lesser-known aspects of Passover; on the morning before the First Seder -- which means this very morning --- first-born sons (or in this generation, first-born children) are supposed to fast from daybreak until the Seder.
I know that no two children have the same set of parents, even though they live in the same family. Why? Because parents are different with each of their children, and no two children ever take the same role.
People have long been fascinated with birth order and how it shapes our lives; and recent research indicates that first- and secondborns do indeed see the world differently in ways that impact their motivation and likelihood of career and personal success.