On the basis of proposals contained in the 1996 report "Learning: the Treasure Within" by the International Commission on Education for the Twenty-first Century (established by UNESCO), the authors examine the influence and pertinence of its construct of education on the four pillars learning to know, learning to do, learning to be, and learning to live together 12 years later. Focusing on learning to live together, the article reviews the background against which the Delors report was published, synthesises the concepts and practices of learning to live together, and proposes some ways forward.