You are assuming a gently 2m rise over the next 180 years, because the earth has been in a locally stable place with respect to climate. Humanity has "jumped t

You are assuming a gently 2m rise over the next 180 years, because the earth has been in a locally stable place with respect to climate. Humanity has "jumped the edge", and the equilibrium will not necessarily settle back to the a similar pattern. Specifically, run-away positive feedback loops are lurking out there, which will push us to a completely foreign part of the parameter space for climate. In fact: it's not even climate - we are talking about the pH of the oceans and the composition of the atmosphere. If this happens, your life will change catastrophically, very quickly. Methanes and clathrates are just two well-known positive feedback systems in play; if we touch one of them we will be miserable. It probably won't end our species, but it will absolutely result in mass extinction of thousands of others.