The claim that democracy and efficiency are contradictory is nonsense. That's evident in the history of democracy itself, because it is only democrats who were and continue to be capable of learning from mistakes. A more appropriate question is to ask whether a country like China, which has been so incredibly successful economically, is actually inefficient in light of its environmental destruction and its corruption. In China's perception, however, the democratic model is doubtlessly inferior.

I am certain that the United States next year, under a new president - regardless whether it's Obama or McCain - will present an ambitious program promoting renewable energies and energy efficiency. Europe could quickly fall behind.

I hope that a German foreign policy in 2028 will be part of a European foreign policy, because even the strong country of Germany won't really have a voice in the world if it is not part of a European voice.

Economically and politically, Germany is extremely stable. There are countries with functioning governments whose institutions don't work. My only concern is about Europe. There's a risk we will run out of time. We have been blessed with a pro-European French president, but we are also approaching the next elections for the European Parliament in 2019, and it will be important for pro-European parties present a credible answer to the anti-Europeans on the left and the right.

A major danger for us Europeans: We must demonstrate that those who have this view of us are mistaken, that we can come to agreement, that we as a community of democratic and free nations are economically successful and are gaining political influence. To do so, we must learn to project our power.

In the business of politics, emotions and productive dissatisfaction with the world in which we live today are gradually being covered up by the minutiae of ordinary life.

We, the Social Democrats, are convinced that capitalism needs to be tamed a second time. The first time we achieved that in Germany for many decades with the social market economy. That is no longer enough. Now we need to do it in Europe and even globally.