In the second part of the epilogue, what details does Gladwell give to help prove the argument of the book?

From the text:

"Look at the extraordinary advantage that their little bit of whiteness gave the colored minority. Having an ancestor who worked in the house and not in the fields, who got full civil rights in 1826, who was valued instead of enslaved, who got a shot at meaningful work instead of being consigned to the sugarcane fields, made all the difference in occupational success two and three generations later."

"My grandmother was a remarkable woman. But it is important to remember that the steady upward path upon which the Fords embarked began with a morally complicated act: William Ford looked upon my great-great-greatgrandmother with desire at a slave market in Alligator Pond and purchased her.

The slaves who were not so chosen had short and unhappy lives."

"It is not surprising, then, that the brown-skinned classes of Jamaica came to fetishize their lightness. It was their great advantage. They scrutinized the shade of one another's skin and played the color game as ruthlessly in the end as the whites did. “If, as often happens, children are of different shades of color in a family,” the Jamaican sociologist Fernando Henriques once wrote:

the most lightly colored will be favored at the expense of the others. In adolescence, and until marriage, the darker members of the family will be kept out of the way when the friends of the fair or fairer members of the family are being entertained. The fair child is regarded as raising the color of the family and nothing must be put in the way of its success, that is in the way of a marriage which will still further raise the color status of the family. A fair person will try to sever social relations he may have with darker relatives... the darker members of a Negro family will encourage the efforts of a very fair relative to “pass” for White."