"As far as the economic content of the common European home is concerned, we regard as a realistic prospect — though not a close one — the emergence of a vast economic space from the Atlantic to the Urals where Eastern and Western parts would be strongly interlocked. In this sense, the Soviet Union’s transition to a more open economy is essential; and not only for ourselves, for a higher economic effectiveness and for meeting consumer demands. Such a transition will increase East-West economic interdependence and, thus, will tell favorably on the entire spectrum of European relations."
January 1, 1970
https://en.wikiquote.org/wiki/Economy_of_Europe