The film’s grand achievement is that it positions its subject as a mediator between humans and the natural world. Life cycles on, and if we make the right choices, ruin can become regrowth.
There's always the risk of sounding preachy in this sort of exercise in a way that scares off those who can be reached, or perhaps worse, being unduly optimistic. Attenborough finds a middle ground.
Our planet is a finite place, and our lives on it are finite, too. The twilight of Attenborough’s time here speaks to that truth so beautifully that you wish this documentary had more to say about it.
It has a whistle-stop quality, and you sometimes wish it would slow down to savour more personal details, rather than dishing out brisk bullet points from this amazing life.