Here he is addressing the growing refugee problem. Analogy of Fairhaven Aftermath of a nuclear war - high radiation levels on the surface.
Some people are below ground in resort like fallout shelters.
They bought into them in advance, Villages are self-governing People outside want to get in. Let in 500 people - This will save some without stressing our resources too much. Proposal 1 - Let no one in. Refugees in other lands are trying to get into our country. A person outside of his country of nationality because of a well-founded fear of persecution by reason of race, religion, nationality of political opinion, who cannot avail himself of the protection of his own government.