The long-running series in which readers answer other readers’ questions on subjects ranging from trivial flights of fancy to profound scientific and philosophical concepts This week’s question: Which leader from history does the world need now? If you could have your pick, what would be the single most useful superpower you could ever have? And would it also be the most fun? It could be anything – not just the normal Hulk strength or flying like Superman. Joe, Potsdam Send new questions to nq@theguardian.com. Continue reading...