Public confidence in our political leadership is at a perilously low ebb. So how we choose, prepare and train the next generation of political leaders is of critical importance. If the Boomers have failed, Gen X has been a disappointment and the millennials are missing in action, then the composition of our future elites matters. One of the most effective nurseries of political talent has always been the Oxford Union. It might be a playground parliament, but it prepared statesmen and women from William Gladstone to Roy Jenkins and Michael Heseltine to Benazir Bhutto for power. In my own time...