Recent extraordinary and far-reaching events have transformed our world. The disintegration of the Communist Bloc has reconfigured international relationships, while the ending of apartheid symbolizes human commitment to unity. AIDS ravages developing countries, and it also has reshaped scientific research and cultural attitudes towards sexuality. The revolution in genetic medicine has coincided with increased rights for minorities and women. A growing awareness of our environment may cause millennial celebrations to be overshadowed by forecasts of ecological catastrophe. In this...