Older readers may remember a time when landmark BBC wildlife documentary series were joyous celebrations of the miraculous fecundity of the planet we’re lucky enough to find ourselves living on. Well, not any longer. In our more censorious age, they’ve become another chance to essentially tell us all off.

So it was that Seven Worlds, One Planet (BBC1, Sunday) began with Sir David Attenborough presenting the usual highlights package of the wonders to come, with each episode focusing on a different continent.