A year ago, I wrote to Gordon Brown asking him to place a moratorium on new coal-fired power plants in Britain. I have asked the same of Angela Merkel, Barack Obama, Kevin Rudd and other leaders.Collectively, Brown, Merkel, Obama and Rudd lead about 500 million people. The idea that one person's policy views should carry so much weight in democratic societies is an indication that Hansen believes that expertise should carry decisive weight in decisions. Hansen is not even a citizen of Germany, Britain, or the United Kingdom, so the mere fact that he is asking the leaders of these countries to act based on his say-so is an expression of scientific authoritarianism. Rather than making the case for his preferred policy, Hansen's argument includes his complaint that policy makers have not followed his advice, which apparently, Hansen believes should take precedent over all other views.