Below is an excerpt from The Economist.
But climate change is an increasingly dangerous context for all their worlds. To understand that context, it is important to understand all the things that climate change is not. It is not the end of the world. Earth is a tough old thing and will survive.
Climate change is, though, a dire threat to countless people - one that is planetary in scope if not in its absolute stakes. It will displace tens of millions, at the very least; it will disrupt farms on which billions rely; it will dry up wells and water mains. ... The longer humanity takes to curb emissions, the greater the dangers and the sparser the benefits.
I guess "planetary in scope" here means the effect of climate change is so big that it's almost affecting the entire planet. (am i right?)
but I don't understand what "in its absolute stakes" means here, especially because I can't tell what definition in the dictionary "stake" means in this context and also I'm not sure if "it" indicates climate change here.
What exactly does the phrase mean?