It is correct that we have already passed some tipping points for global warming. We will have a temperature increase of at least 1.5°C. All our efforts should be focused on preventing to reach other tipping points.
If anyone wants to read a good horror story read the scenarios for a temperature increase of 5-8 °C in 2015. There will be billions of people dying. This is a date most of us will still be alive and it is possible to prevent. It is even in the interest of every hardcore captialist. If we do nothing the damages will so high that capitalism will no longe be possible.