Tom Stoppard, playwright and scriptwriter, joins the debate about state surveillance of the internet in a typically excellent column for the Guardian. What, he asks, can justify surveillance on the scale revealed by Edward Snowden's leaks? Is safety really a sufficient justification for such intensive intrusion?
Any students who are Times subscribers (print or digital) should take advantage of the latest Times+ book offer - a free download of a collection of Marie Colvin's journalism. The offer is available now from The Times website, www.thetimes.co.uk