This series started in 1981 with the Erice Seminars when the danger of a nuclear East-West confrontation was menacing the world. The volumes reproduce the crucial steps, from the Nuclear Winter to the Strategic Defense Initiative. After the collapse of the U.S.S.R., new emergencies are now to be faced such as the danger of proliferation of Weapons for Mass Destruction (WMD), the North-South confrontation on ecological problems and the new deal for Science and Technology to help developing countries in their struggle for a better standard of life. The Erice Seminars have attracted the attention of world leaders in Science, Technology and Culture.