England-as a separate nation-does not exist in the sense of being a political entity in the world of nations. it is in fact part of the united kingdom. england today as a place is a potpourri of immigrants, ideas, values, and social norms that vary tremendously. but when the world cup soccer matches begin, england suddenly exists as a nation, united by a single passion-to win the cup. such melding of different peoples is a kind of

Such melding of different peoples is a kind of Ethnogenesis. Ethnogenesis (from the Greek "ethnos"-people - and "genesis" - origin-) is a process by which a group of people is gathered to form a new ethnic group. These people may be ethnically associated with the new group or be outsiders who self-identify with the values/thoughts/ideas of the new group.

More specifically, this particular example is Passive Ethnogenesis, because people come together in a group that creates cultural-identity relationships, in this case being fans of the national football team.