Scientific and technological change in the life sciences is currently transforming the problem of preventing biological warfare and biological terrorism. This transformation will demand a radical and rigorous new approach to biochemical arms control, for which the existing prohibition regimes for chemical and biological weapons are necessary but insufficient building blocks. Examples from the areas of immunology, neurosciences, and the neuroendocrine-immune system are used to show the magnitude of the problem. This book will conclude with outlining additional measures required to control biochemical weapons in the 2lst Century.