“If it is such a good idea, why has evolution not built us that way?” That is the question two philosophers say we must ask before we attempt to enhance our human capabilities.
We already augment our minds with drugs such as Ritalin and modafinil, our sexual performance with Viagra and our immune systems with vaccines. These are nothing compared with what might be on the way, from brain implants for a better memory to genetic modifications for sports performance (Â鶹´«Ã½, 13 May, p 32).
Before we consider forging ahead with these technologies, we need to consider why…
