In her debate with Emmanuel Macron, National Front French presidential candidate Marine Le Pen argued that without clear borders, solidarity was impossible and would be diluted. This unethical vision is linked to the idea that some human beings are more worthy of solidarity than others. This is the same notion behind any nationalist movement, and it is based on the premise that our people are more important (and better) than the rest of the world. But universal human values are totally in contradicion with the idea that some humans (especially those living in rich nations) have priority over others. Beyond this ethical argument, there is also a very practical argument against patriotic solidarity, and it is based on the fact that most of the problems of the people that deserve more solidarity in the rich countries cannot be solved in the context of a nation-state with closed borders. The increasing concentration of wealth at the international level, the existence of tax havens, the mobility of capital and tax competition, the social problems associated to refugees and climate change, all these are international or global problems can only be addressed at a transnational level. Le Pen, Trump and other xenophobic nationalists, and also those in the far left (like Mélenchon) that cannot make up their minds between proto-fascism and pro-European candidates, all these try to sell the idea that the forces of globalization can be stopped. I always ask this to my students, especially those to which I teach an introduction to economics in the degree of sociology: do you believe that globalization can be stopped? None of them believes so, and they are the kind of people that could do it perhaps (the kind of people -strong, young, probably radical and educated- who could perhaps stop globalization). No, globalization will not be stopped, at most perhaps it can be de-accelerated, but I am not even sure about this. If it cannot be stopped, it must be governed. Re-distributive, even pre-distributive policies, must be designed and implemented at a supranational level, and therefore political action must be more and more international. One of the unintended consequences of the Le Pen danger in France has been the activation of a European demos opposed to her and supportive of a better, united, democratic Europe. A pro-European left is a redundancy (the left cannot be anti-European), patriotic solidarity is an oxymoron.