Well, there are a few reasons, but I will give you an advantage, where you can find the disadvantage from it.
Europe has a small coastline, but with it, there's a sea that leads straight to north America. That means there's easy transport of goods.
Answer:
The fact that the British ceded territory led to American expansion and more conflicts with the Native Americans.
Socialism and communism are alike in that both are systems of production for use based on public ownership of the means of production and centralized planning. Socialism grows directly out of capitalism; it is the first form of the new society. Communism is a further development or "higher stage" of socialism like communism, calls for putting the major means of production in the hands of the people, either directly or through the government. Socialists differ from communists in that they do not believe that the workers will overthrow capitalists suddenly and violently.
Answer:
They would want to move to a new country because of the enviorment, or because they need to be closer to something. There are many other reaosns.