Well in this country we define citizens as anyone being born as United States citizens as being natural born. They can be from any country and their child may be a citizen of the U.S. This can be controversial but ultimately it does very little for anyone to do this and if so can lead to some conflict on federal or state terms. Besides that you can be a citizen even if you were not born in the US this is either done by immigrating legally and passing various tests or by having one parent be an American citizen. Either or is acceptable.
Leading European democracies in addition to the US were challenged by crippled economies and devastated landscapes from World War I. Governments were wanting a return to more isolation and policies which favored their own countries. In the case of Germany, they were struggling to reestablish nationalism and were unable to defend themselves as a country. As a result many people in those countries turned to alternate forms of economy and government to create solid nations once again. All countries saw a rise in socialist thinking and some countries began to move toward socialist ideology. In others especially, Italy and Germany a move toward fascism took place which put nationalism at the forefront and a build up of capitalism to secure their economic place in the world.
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