Unless you have done a little (or a lot) of family history research, you may not be aware of how many potential relatives you have in the world. Often our immediate families, before we married and had children, consisted of our parents, grandparents and a sibling or two or three. Many people never knew great grandparents and maybe never thought much about them. I was fascinated to learn, some years ago, just how many people came before, and that if anyone of them had not existed, neither would I. With each generation going back the number doubles. You have two parents, four grandparents, eight great grandparents and so on. The numbers double into infinity, or Noah, or a monkey, whichever comes first. LOL
The chart gives an idea of how it works in just eight generations.