Given that it is fairly easy to identify those "dominant forces" you should check whether there were any significant amounts of immigration to those places before they achieved top-dog status.
By my estimate I can see only one country that has had mass immigration and then which achieved dominant world power status fairly soon afterwards: the United States. Are these connected, probably, are they connected because the immigrants were made up of a tribe of wandering genetic entrepreneurs moving onto their next conquest, I suspect not.
By my estimate I can see only one country that has had mass immigration and then which achieved dominant world power status fairly soon afterwards: the United States. Are these connected, probably, are they connected because the immigrants were made up of a tribe of wandering genetic entrepreneurs moving onto their next conquest, I suspect not.