I think that depends on how you define 'civilisation'. My inclination is that most people would say civilisation has ended if life is drastically different to how they perceive their life/world they live in. Think 'civilisation as we know it' rather than a dictionary definition.
However, I disagree that it's not an existentisl threat, if only on the basis of possible crop failiures on a massive scale (reduced crop yields are a global issue already). Don't underestimate the impact of food shortages on everything else, we in the west have become accustomed to easy access to food.
An asteroid impact or super volcano eruption has the potential to kill every single human on earth and end the human race. That's what I mean by existential threat. I feel like many people think of climate change as something that's on the same scale but it really isn't. Saying stuff like "climate change will ruin us all" just isn't true. There are degrees of bad and while climate change definitely is up there in the bad end of the spectrum there's still events that are orders of magnitude worse.
I think that depends on how you define 'civilisation'. My inclination is that most people would say civilisation has ended if life is drastically different to how they perceive their life/world they live in. Think 'civilisation as we know it' rather than a dictionary definition.
However, I disagree that it's not an existentisl threat, if only on the basis of possible crop failiures on a massive scale (reduced crop yields are a global issue already). Don't underestimate the impact of food shortages on everything else, we in the west have become accustomed to easy access to food.
An asteroid impact or super volcano eruption has the potential to kill every single human on earth and end the human race. That's what I mean by existential threat. I feel like many people think of climate change as something that's on the same scale but it really isn't. Saying stuff like "climate change will ruin us all" just isn't true. There are degrees of bad and while climate change definitely is up there in the bad end of the spectrum there's still events that are orders of magnitude worse.
If we trigger tipping point after tipping point, we can turn earth into venus. You're just wrong.