Memo from To: JOSHUA LEDERBERG MONEY as the root of all evil. The rash of hijackings aimed at extorting ransom payments dramatizes the vulnerability of modern society to grievous. interference by highwaymen, muggers and thieves. A variety of technological antidotes has been recommended. Some of these already take account of certain properties of MONEY as a root problem. Taking cash out of the transactions overseen by the bus and cab driver has, I believe, been an effective preventive of what was once a serious form of personal crime. The'cashless society’ (credit cards etc) is doubtless another useful step in minimizing opportunity for gainful crime, but cash, even in amounts of $100,000 or even $500,000 is still an attractive incentive. Is there a legitimate need for a completely negotiable, untraceable medium of exchange beyond petty coinage? If not, we should consider whether we do not already have the technology to be able » to trace a sufficiently large sample of currency to be an effective deterrent to a variety of crimes. I will not attempt to detail the sys- tem; xhe if the premises are sound, this should have very detailed study. Roughly speaking, I have in mind the machine-readable encoding of all currencg;and computer matching of a sample of \ transactions at banks, etc., to facilitate tra- ‘ cing of "wanted" items. I am merely guessing tha an effective sample of traces would be more than paid for by the benefits of law enforcement, and the deterrence of violent crime and of sian etc. PROFESSOR JOSAUA fevenserc Department ¢f Genetics School of Medicine Stanford University Stanford, California 94305