Qn.“Does temperament depend on one’s order of birth? I have heard of claims that it is okay for first-borns to be harsh and high tempered”
For the Jewish people, the first born son has a very special role, and in terms of inheritance. He is entitled to a double portion. In the Book of Genesis 25:26 we read the story of Isaac and his two sons Jacob and Esau. For a small amount of food, Esau the first son sold his birthright to Jacob.