The Court ruled that freedom of speech and freedom of the press under the First Amendment could be limited only if the words in the circumstances created "a clear and present danger
Because Western European nations had turned to communism
Well it depends what they are in need of. They most commonly would want more land for their country to build and farm on. They may want land with fertile soil for farming. They may want the land because of it's geography, for example, for simple trade routes leading to and from the areas around north America (Canada, Mexico) etc.
A
Hope this helps and I don’t know how to explain but hope it helps