The major moral issues of our time have been made vital and immediate by the convergence of numerous factors. Among these are a technology that has produced the threat of nuclear holocaust, that can maintain life beyond the death of the brain, that can destroy the natural world, and that produces deadly, indestructible waste. There is a new sensitivity to the injustices suffered by minorities. Impoverishment and starvation are now the fate of millions. Political tyranny is a continuing threat. Finally, the rise of a new religiousness has had an impact on morals and public affairs. In these provocative essays chosen from The Tanner Lectures on Human Values and first published in 1987, four internationally distinguished scholars explore the moral implications of these issues in today's world.