Birth Order: How the Roles of Each Sibling are Placed at Birth?

This book discusses the traits of the first born, middle born, last born, and only child

The pecking order amongst the birth order.

How first borns are natural born leaders?

Why the middle borns seek justice?

Why the last borns are ambitious?

And why only borns get everything they want and how they feel when they have no sibling to play with.