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.

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.

However, I have a low opinion of people with narrow political horizons. Someone who talks about the environment and knows nothing about economics can make as many mistakes as someone who does the opposite.

The G8 nations, together with the five major emerging economies of China, India, South Africa, Brazil, Mexico, use almost three-quarters of the Earth's biocapacity - the capacity of the world's ecosystems to produce natural resources and to reduce harmful substances.

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.

Iran is the only country in the world that's threatening to erase another country from the map as part of a collective genocide.

When you think back today to a time more than 70 years ago when Germany was a terrible place, a place people were afraid of, it is a wonderful development that we have gone from being a terrible place to a place that people dream of.