Almost a half-century ago, André Voisin had already grasped the importance of elements of the soil and their effects on plants, and ultimately, animal and human life. He saw the hidden danger in the gross oversimplification of fertilization practices that use harsh chemicals and ignore the delicate balance of trace minerals and nutrients in the soil. In this volume Voisin issues a call to stand up and acknowledge our responsibilities for public health and protective medicine ¿ part of a concerted attempt to remove the causes of ill health, disease and, in particular, cancer.