The language of constitutional government, scientific inquiry, freedom of conscience, religious toleration, and universal rights owes much to eighteenth-century philosophy. More than any other intellectual movement of the modern era, the Enlightenment claimed that reason could discover principles valid not merely for particular nations or religions but for humanity itself. Universalism became one of its defining aspirations. It has also become one of its greatest controversie

Several months ago, I argued that artificial intelligence raises ethical questions. The assumption that technological progress automatically produces human progress has appeared repeatedly throughout modern history. It was present in parts of the Enlightenment, resurfaced in certain strands of neoclassical economics, and continues to shape contemporary discussions surrounding artificial intelligence. Yet ethics may represent only part of the challenge posed by AI. A second an