The sustainability agenda is becoming an important element in business education. This is because there is a growing understanding of the need to develop strategic thinking that safeguards the long-term sustainability of business. To that end the Agent-based Computational Economics of the Global Energy System (ACEGES) project is introduced as a novel framework for developing a new generation of long-term decision scenarios. At a more general level, the project raises awareness of sustainable thinking in long-term business planning by means of controlled computational experiments. This paper describes the ACEGES tool, which has been introduced at a business school in the UK to educate students in the art and science of sustainable strategic thinking.