The answer for this would be the individuals on the island would all appear very alike to individually or each other, and they may demonstrate uncharacteristically high incidences or manifestation of traits that are unusual in the universal human population.
The concept of nullification is a "legal theory that a state has the right to nullify, or invalidate, any federal law which that state has deemed unconstitutional with respect to the United States Constitution (as opposed to the state's own constitution)."
Lincoln was worried about Kentucky, Missouri, Maryland, and Delaware because they were all border states during the civil war. He was worried that they would transform into complete slave states. If they did, the north wouldn’t have much more land and the north would have lost the civil war. He wanted to contain them.
Answer: settlement of the great plains
Explanation: