Tsunami, earthquake, volcano, hurricane, pandemic—are these and other natural calamities more probable—and more frequent—than they were? Are things gettng worse? If so, what can we do about it? Are the boundaries between natural and human-caused calamities blurring? Are we ourselves part of the problem? In Dangerous World, de Villiers examines these questions in a time when we truly need to understand the dangers that we face, to act in such a way that we are not making things worse, and to prepare as best we can for the inevitable disasters when they come.