Common drugs can affect our minds and morals – but should we worry?

Neuro-scientific research is rapidly expanding our knowledge of how we can alter brain function – for better or for ill. Most of this research is motivated by a desire to cure disease or to slow down normal age-related decline, of course. But some of it seems to hold out the hope of improving function in the already well-functioning brain. We might be able to enhance attention, for instance, or working memory, mathematical ability and even our