This edition is a complete revision of the Dartmouth Medal-winning set first published in 1995. Covering a wealth of topics on the ethics of health professions, animal research, population control and the environment, the set helps researchers to consider the impact of new scientific knowledge and its potential to harm or benefit present and future generations. All bibliographies have been updated and new entries added - from cloning, to issues of privacy or censorship on the Web, cell-stem research, same-sex marriage, privatization of water access, animal rights and much more.