Breeding Between the Lines is the first book to outline the significant genetic and physical advantages of mixed-race heritage. In places, mixed marriages remain taboo and frequently lead to conflict, even violence. Those against mixing races list negative consequences, and even those who support interracial marriage speak of the prejudice that the couple and their children will face. In Breeding between the Lines , Alon Ziv combines sex, race, health and genetics to form a daring new theory; in a nutshell, interracial people are healthier and more attractive.