International audienceTo read United Nations data and projections, urbanization is the indefinable horizon of the future of the planet. For the first time in the long history of humanity, the urban population would have become the majority in the world in 2008. And the future would see the continuation of the rise in the rate of urbanization, causing, of course, a relative decline the rural population, but also, in the long term, a fall in the number of rural people. But are these projected developments certain?.À lire les données et les projections de l’Onu, l’urbanisation est l’horizon indépas-sable de l’avenir de la planète. Pour la première fois dans la longue histoire de l’humanité, la population urbaine serait devenue majoritaire dans...