No one knows, many humans and other species are already dying from climate change today. Get used to hearing the phrase "It is happening much faster than expected." from now on.

"Collapse is a process, not an event." It's very likely we'll be extinct by the end of the century. There will be all manner of hell from now until then. Our population of over 8 billion is only possible because of a highly complex global web of systems. Complex systems are fragile. Once dominos start falling, people will start starving very quickly.

The typical Lemming will be poorer but fine, unless it triggers other human disasters like a nuclear exchange. The lower classes of Bangladesh, less so, and 95%+ of coral reefs are fucked.

I would say under ten years if we are talking about staying in "life as we know it." Global food supplies are at risk. We are going to see mass die offs in large portions of the ocean. AMOC and the Jet stream will continue to wobble around causing mayhem. Coastale areas will become eroded and huge portions of the infrastructure will become unfixable as the disasters come too frequently for any real, long term repairs to remain.

Think about that term, tipping piont. Tipping does not imply a gentle decent.

that's a loaded and optimistic question. With the way the world is going currently being taken out by climate change and only climate change is awfully optimistic. I think that would be the best case scenario at this point.

This guy says climate change mitigation will be a blip on the radar of economic growth:

https://www.youtube.com/watch?v=bfNamRmje-s