In this commemorative volume, Robert Mackenzie Johnston's writings on geology and the economic and social issues of his time are brought together for the first time. From his pioneering work on the geology of the British Isles to his insights on the challenges of urbanization and industrialization, Johnston offers a rich and varied perspective on the issues and controversies of his day. This book is a must-read for anyone interested in the history of science and the role of science in shaping social and economic policy. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.