New Scientist LiveA note from the executive editor on New Scientist Live There's just over a month to go before the world's greatest festival of ideas and discoveries, so grab your tickets now, says Timothy Revell News
CommentA powerful new book shows why it's so important to understand war In his latest book, Why War?, historian Richard Overy grapples with a question that stumped Albert Einstein and Sigmund Freud – why do humans persist in waging war? Culture