Which leader from history does the world need now?

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 Last week’s replies: What would be the most useful superpower?

It’s clear that the world as it is – considering the climate crisis, the rise of nationalism, geopolitical tumult, the possibility of AI killing us all by the end of the decade – could do with some more ethically astute and capable leadership. If you could timewarp them into the present day,…