Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain
the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in
Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles
and JavaScript.
The pre-winter equinox is a time for getting back to serious business. Mr Gorbachev and his counterparts in the West have a great deal to do before they let the northern winter take over.
This week's strategy for saving the United States from a new wave of drug dependency may create a sense that something is being done, but the real war will have to be won by different means.
Hopes that drug therapy will improve the lot of those infected with HIV have brightened, but it is too soon to tell what the consequences will be for the general spread of the disease.
The doctrine that polluters and other environmental desperadoes should be required to pay for the damage they do is beguiling, but first requires general agreement on broad philosophical principles unlikely soon to be reached.
The widespread conversion of democratic governments to environmental causes is understandable: it keeps, or even catches, votes. But the consequences are increased costs and the tolerance of irrationality.
The British seem to be heading for trouble in their sporting relations with South Africa, but the case for an academic boycott remains as insubstantial as it has always been.
The US Department of Defense is being given a predictably but understandably rough ride by the US Congress. It should prepare itself for the end of the Strategic Defense Initiative and should put the B2 bomber on ice.
President George Bush's plans for Mars will disappoint the enthusiasts, but they will not send the value of the US dollar into decline, for which everybody should be thankful.