we might add not only an economic superpower for it is that important player on the world' stage this is required by the interests including the economic interests
We might add: not only an economic superpower, for it already is that, but an important player on the world stage, because this is required by the interests, including the economic interests, of all the Member States.
We might add: not only an economic superpower, for it is that, important player on the world stage, this is required by the interests, including the economic interests, of the Member States.