 We have to really bear in mind that it's not a static world we have been looking at over these 30 years. The world has also changed. China has emerged, for example, as being a dominant power in the world, which it wasn't at the time why there was being founded. And because of China's progress, judged in terms of people's proportion of population below some specified poverty line in China, that has declined. There have been also regression, even in that respect in parts of Africa and parts of Latin America. There have also been an understanding that even just the increase in GDP and reduction in the number of people below the poverty line does not eliminate the kind of deprivation, the kind of hardship that motivated people to work on better economics and a better society. The problem of development and the deprivation of human lives remains a central issue, even when they have become a much bigger understanding, much deserved understanding of the whole climate, of the environment in it. So the centrality of human life is very important in that. I think to some extent the group Wundland in the Wundland Commission before already made a major step forward in trying to understand the environmental challenge, not as limiting economic growth, but making growth sustainable. Sustainable in terms of human quality of life. I would say not just the standard of living of human being, but everything that human being value. Some of the debates on climate, including global warming being the only concern, has tended to downplay other dangers. For example, World Bank in a famous statement declared nuclear energy as one of the clean energies. Now you have to say that in Fukushima. So in a world of one priority, global warming to be reduced, you've missed out a lot of things. You have to take again a wider view. The need to address the issue of measurability has become much stronger today. I think people don't understand what measurability is. Measurability is basically ranking. It begins by saying A is better than B than C. So when somebody says a life without culture and neglecting cultural features make the society impoverished, you already are measuring something, you're ranking. It's a question of what type of measurability we are seeking. Aristotle put it more than 2000 years ago. To every subject you have to seek that degree of exactness which the content of the subject matter allows.