“Brilliant. The most authoritative, calm and comprehensive account of the most contentious issue in the western world. There is no better guide than Sumption through the arguments to the reality.” Trevor Phillips, columnist and presenter"No one truly interested in this most contested area of public life can afford to miss What Is Immigration Policy For? Whenever I want to know what is really happening with migration – if I need to know the truth rather than the partisan outpourings of populists or the frightened formulations of politicians – Madeleine Sumption’s work is where I head. If only everyone else did. If only they would all read this excellent book.” David Aaronovitch, journalist and author“No topic is hotter or more divisive than immigration. Thankfully, we have the coolest head in the business sharing her accumulated wisdom with us here.” Sir Anthony Seldon, historian, author and educator