Environment of Man is the eighth of the Croom Helm series of mono- graphs on Biology and the Environment. The first volume, by this author, was a straightforward review of the principles of ecology as applied to the history of the earth. The second volume by J.L. Cloudesley-Thompson applied ecological principles to terrestrial habitats, and was followed by two volumes by C. F. Hickling and E. J. Ferguson-Wood on the ecology of aquatic habitats. The fifth volume, by Robert L. Snyder, reviews the natural ecological safeguards which control excessive growth of popUlation and discusses how these...