The better the climate ( temperature of weather ) the more people will want to live there. So they come, get a job and increase the economy.
Answer:
Wilson tried to keep the United States neutral during World War I but ultimately called on Congress to declare war on Germany in 1917. After the war, he helped negotiate a peace treaty that included a plan for the League of Nations.
Because a pandemic(unlike and epidemic, which is more provincial) reaches around an entire nation and/or continent. Obviously, a nationwide sickness would be terrible for a newly developing nation trying to get on its feet for the first time. It’s just more unnecessary work for the new nation to deal with. Hope this helps!