On understanding Science' reveals the thoughts of an eminent scientist who placed education in the forefront of his obligations toward mankind. By questioning how to teach science to the layman, J. Conant suggested a course in the 'Tactics and Strategy of Science' through the study of 'case history'. By doing so, he intended to bridge the gap between the scientist and the layman who is taught, not the methods and facts by which science has been advanced, but the resulting knowledge of scientific advancement. In other words, his purpose was to educate for a greater degree of understanding in science by an historical approach. Will then the layman in position of authority be contributing better to the welfare of society? As mentioned in the preface of the 1947 first edition of the book, J. Conant was, at the time, apprehensive that an agreement for international control of atomic energy would not be reached. By reforming the scientific education of the layman, he was inclined to hope that social progress will occur upon understanding the tactics and strategy of science.