The proportion of women graduating with engineering degrees in the UK and US has remained around a sixth for at least the last thirty years despite many campaigns to achieve gender equality. One of my colleagues, Professor Elena Rodriguez-Falcon, writing in the New Statesmen asked whether it will take another world war to get more women into engineering. I think that the sort of seismic shift in attitude caused by such events will be required. Many in the engineering profession claim that problem-solving is a unifying skill, which is common to all branches of engineering, and yet we have been unable to solve the problem that our profession is one of the least gender diverse. Does this mean that we have not really been trying to solve the problem, or that we are not the problem-solvers we claim to be?