The article describes the dutch energy transition approach as an example of an industrial policy approach for sustainable growth. It is a corporatist approach for innovation, enrolling business in processes of transitional change that should lead to a more sustainable energy system. A broad portfolio of options is being supported. A portfolio of options is generated in a bottom-up, forward looking manner in which special attention is given to system innovation. Both the technology portfolio and policies should develop with experience. The approach is forward-looking and adaptive. One might label it as guided evolution with variations being selected in a forward-manner by knowledgeable actors willing to invest in the selected innovations, the use of strategic learning projects (transition experiments) and the use of special programmes and instruments. Initially, the energy transition was a self-contained process, largely separated from existing policies for energy savings and the development of sustainable energy sources. It is now one of the pillars of the overall government approach for climate change. It is a promising model but economic gains and environmental gains so far have been low. In this article i give a detailed description of the approach and an evaluation of it.