The transition to sustainability can be compared to a phase transition, for instance the transition from liquid water to water vapour. This simple analogy reveals an important insight about the much needed transition to sustainability: phase transitions may depend on several different parameters. Even in the simple case of water, the transition is dependent on two independent parameters, i.e. temperature and surrounding pressure. How much more complex is a transition of entire societies towards more sustainable ways of production and consumption, of energy production and transportation, of food and agriculture! Only if we understand the complexity of the issue, only if we take a comprehensive view on the different critical parameters we will be able to facilitate the phase transition.