I think that whether we like it or, not, the stage is now being set for the third world war. I think I an not the only one who believes this. If it happens, the third world war will have resulted from individual and tribal greed over the earth's diminishing resources and it will have been aided by breakdowns in understanding between people and tribes. Perhaps people of different nations and races and cultures don't know enough about each other and perhaps if they did they might find out how to accommodate to each other perhaps there are ways in which they can find out. Perhaps education is one of the possible means. This study takes a look at a unique approach to the hope that education is a force which can be used to unite nations and races. Since there is as yet no instrument designed to measure whether a person educated internationally is or is not contributing to world peace, it is necessarily descriptive. The work starts with a review of developments in international education and moves to a consideration of what this mode of education is. It then deals with the only known vehicle of international education operating at the secondary level, the International Baccalaureate. The study then gives an account of the early efforts of those who founded Atlantic College. It moves to a description of the international organization set up by Lord Mountbatten to co-ordinate the efforts of all those around the world who are persuaded that education can help prevent war. Cameos of the three existing United World Colleges follow. They are: the United World College of the Atlantic; the Leste 3. Pearson College of the Pacific; the United World College of South East Asia. Finally, the paper considers the question of the proliferation of United World Colleges, examines some of the project's problems and concludes with a few guesses at what might happen in the future.