Help with describing the different push and pull factors leading to immigration?

I think that the same premise applies today as it did back
then - people come to "the New world" (although it is no longer new) because they are
seeking an escape from something that they are leaving behind in their country of
origin.Therefore, the push is to leave a bad situation. The Puritans were separatists
(meaning that they had ideas that were not in line with the majority - in this case
religious ideas - so they separated). They were being persecuted for their beliefs, so
the push, for them, was to escape. Settlers in the Virginia colonies, on the other hand,
had a different push - economics. They were n ot making as much in Europe and the new
world was a land of economic opportunity. The pull factors, then, were freedom and
opportunity. These are the same factors that drive immigration today. Many immigrants
feel that the societies they live in are oppressive, the rules are unfair, the
government is not doing its job. Others feel that America is a land of economic
opportunity. In either case, the push is to get away from a negative situation, and the
pull is a possibility of a more positive life.