I'm trying to pinpoint (if it even is specific) the opportunities that people will leave everything in order to have.
At first I thought this happens when people move far away to go to college, or to accept a job offer. Those both offer the same opportunity: more wealth. But what really interests me are the entire waves of immigration, and how they seem to have the same motivating factor: the California Gold Rush for example.
But there have been all kinds of groups of immigrants. Pilgrims to the New World, Mormon settlers to Mexican Territory, refugees from wars, Italians to Argentina, groups of Jews have immigrated to various parts of the world, and many other significant waves of immigration- considering all of those, immigration waves included a wide variety of people.
Is there still a common thread across almost all groups? Is there a specific type of opportunity that almost every group of immigrants wants? (This is assuming the group of immigrants had a common thread and prevalent opportunity among themselves, maybe that's not even true. And I'm not saying immigrants always grouped to one location, but I'd like to focus on just those stories.)