Thanks to technology, what almost anybody can do has been multiplied a thousandfold, and our moral understanding about what we ought to do hasn't kept pace. ... You can have a test-tube baby or take a morning-after pill to keep from having a baby; you can satisfy your sexual urges in the privacy of your room by downloading Internet pornography, and you can keep your favorite music for free instead of buying it; you can keep your money in secret offshore bank accounts and purchase stock in cigarette companies that are exploiting impoverished Third World countries; and you can lay minefields, smuggle nuclear weapons in suitcases, make nerve gas, and drop 'smart bombs' with pinpoint accuracy. Also, you can arrange to have a hundred dollars a month automatically sent from your bank account to provide education for ten girls in an Islamic country who otherwise would not learn to read and write, or to benefit a hundred malnourished people, or provide medical care for AIDS sufferers in Africa. You can use the Internet to organize citizen monitoring of environmental hazards, or to check the honesty and performance of government officials -- or to spy on your neighbors. Now, what ought we to do?