The quest for the ecological sustainability of planet earth could be much more successful than is currently the case. The purpose of my presentation is to corroborate this claim and to propose a structure by which a sustainable future can be achieved. The issue of sustainability has been addressed in different contextslocal, regional and worldwide. I maintain that these efforts can only be effective, if actors at multiple structural levels strive simultaneously and cooperate for materializing

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... e vision of a sustainable world. The distribution of tasks along these organizational strata is a nontrivial task. To master it, a recursive structure based on the Viable System Model is presented, which shows how the efforts for sustainability can be organized in a much more powerful way than by conventional approaches. The proposed structure enables agents at each level to generate variety in balance with the complexity they face. This presentation should also help decision-makers understand that pertinent frameworks are needed to enable actors at each level, from individual to global.