"Hamish Low, a Cambridge professor who works in applied economics, does not mourn the loss of philosopher kings’ grand intellectual debates. “Now we need to be much more evidence based”, he says. But the discipline’s development has come with a cost. The specialisation associated with expertise can encourage narrow thinking. “Disciplines are now defined too much by methods rather than by questions”, Low says. This narrowness feeds through to policy advice, which too often applies established models to current circumstances, rather than considering fundamental reinterpretions of the issues."