If Only Geographic Borders Didn't Change!

It certainly makes it easier to do genealogy if your family lived in the same place for hundreds of years, doesn’t it? Well, maybe. The reality is that over time, borders are always changing. As America became more settled by non-native people, the borders of cities, counties, colonies, and then states were forever shifting. In Europe, centuries of disputes over who ruled what and where meant that stability was the exception and not the norm. What do movable boundaries mean for those of us trying to research our families?