Trans-Atlantic security needs have changed fundamentally in the last two decades. The East-West confrontation has ended, and Moscow now shares many interests with NATO. It is time for the alliance to open its doors to Russia, say German defense experts Volker Ruhe, Klaus Naumann, Frank Elbe and Ulrich Weisser in the following open letter written to the German public.

Former German Chancellor Helmut Schmidt has noted with concern that many of today's politicians have too little knowledge of history. He could well have added that those same politicians are also frighteningly deficient when it comes to understanding strategic and security issues. In Germany, there is no significant discussion about the future of NATO, its self-image, its strategy for the future and the question of how Russia can be included. Berlin is not showing any opinion leadership, nor is it spurring international debate. This has been a disappointment for other members of the alliance, who are asking themselves whether the Germans are afraid of the debate or are simply no longer capable of contributing to it in a forward-looking way.

Europe's security, though, remains a constant task, and new challenges require different responses than in the past. The Euro-Atlantic region needs peace and stability at home, but it also needs protection against external threats. Ultimately, the emergence of a multi-polar world requires finding a way to offset the political, economic and strategic dynamics of the large Asian powers.

NATO, in its current form, is not up to these tasks. In the future, the alliance should see itself as a strategic framework for the three centers of power: North America, Europe and Russia. This trio has common interests that are threatened by the same challenges, and which require the same responses. If the alliance intends to be the primary forum for addressing all crises - because it is the only forum where North America, Europe and Russia sit at the same table - then it must now establish the requisite institutional framework for that to happen. The door to NATO membership should be opened for Russia. Russia, in turn, must be prepared to accept the rights and obligations of a NATO member, of an equal among equals.