“one drop” rule the one-drop theory One Drop Rule One Drop Rule One drop rule One-drop rule One Drop one drop of colored blood to be considered Negro “one drop” rule en:One drop rule one drop rule One Drop Rule one-drop rule “one drop” rule one drop of colored blood to be considered Negro One Drop Rule one drop rule One-drop rule ワン・ドロップ・ルール One Drop One-drop rule One Drop Rule ワン・ドロップ・ルール one drop rule one-drop rule. one drop rule One Drop Rule