Genesis 36:32 says, And Bela the son of Beor reigned in Edom: and the name of his city was Dinhabah.  This is the list of rulers of Edom.  Verse thirty-three states, And Bela died, and Jobab the son of Zerah of Bozrah reigned in his stead.  Verse thirty-four adds, And Jobab died, and Husham of the land of Temani reigned in his stead.  Husham was evidently from another area when he took over the rule of Edom after Jobab died.  Verse thirty-five says, And Husham died, and Hadad the son of Bedad, who smote Midian in the field of Moab, reigned in his stead: and the name of his city was Avith.  Evidently, Hadad was someone who had been victorious in battle when he assumed the reign.  These rulers were not assuming control based on being born a son of the previous ruler.  Verse thirty-six states, And Hadad died, and Samlah of Masrekah reigned in his stead.  Once more, Samlah was evidently from a different area.  Verse thirty-seven adds, And Samlah died, and Saul of Rehoboth by the river reigned in his stead.  Then, verse thirty-eight continues, And Saul died, and Baalhanan the son of Achbor reigned in his stead.  About all we are told about these rulers is that they ruled.  Today, there are a lot of rulers in the world who come and go with very little to note about their time as ruler.  Verse thirty-nine says, And Baalhanan the son of Achbor died, and Hadar reigned in his stead: and the name of his city was Pau; and his wife’s name was Mehetabel, the daughter of Matred, the daughter of Mezahab.  For Hadar, we are told his wife's name, and her mother's name as well.  This was unusual in those times.  Verse forty states, And these are the names of the dukes that came of Esau, according to their families, after their places, by their names; duke Timnah, duke Alvah, duke Jetheth,  Then verse forty-one adds, Duke Aholibamah, duke Elah, duke Pinon,   Verse forty-two continues, Duke Kenaz, duke Teman, duke Mibzar,  Then, verse forty-three concludes, Duke Magdiel, duke Iram: these be the dukes of Edom, according to their habitations in the land of their possession: he is Esau the father of the Edomites.  Evidently, after Esau established himself in the land, many of his descendants ruled in Edom.  Once again, we are told that Esau was the father of the Edomites.  Though Esau was successful in worldly terms, he had sold his birthright in God's kingdom.  Even if we are very successful in the world, if we are not following God's will, then eventually we will die, and all will be lost.  Someone else will inherit or simply claim everything that we have left in this world.