One of my favourite books is The Great Migrations by John Haywood. It documents and analyses the most significant movements of peoples since the dawn of mankind. There have been many such migrations and now, in the 2010s, we are in the grip of another, no less significant, movement of human beings, chiefly (but not exclusively) from Syria to neighbouring lands and beyond. Reasons for such migrations vary; it is important to bear this in mind when we see images in the newspapers and on the television. We must address the Syrian refugee crisis with a critical eye and a cool head, not let our baser emotions cloud our judgement.