Compare https://en.wikipedia.org/wiki/Economic_impacts_of_climate_ch... Wikipedia quotes studies that put the estimated aggregate impact at losing about 0% to 20% of world GDP. That's comparable eg to moving from NYC to a place with average US GDP per capita. That's certainly a lot, but perhaps not a world shattering impact. (Edit: the studies quoted on that Wikipedia page are quite old by now. It would be useful to…
Assuming that continued economic growth takes place (a safe assumption; the so-called third world countries are growing at a fast pace), the net economic result could still be positive. Here's a quote from Nick Bostrom from the Wikipedia article: > Even the Stern Review on the Economics of Climate Change, a report prepared for the British Government which has been criticized by some as overly pessimistic, estimates t…
However, I would go by the formulation in your quote "swamped by other factors" and not with "the net economic result could still be positive."
To make your formulation work, you'd have to say the net impact of business-as-usual growth and climate change. It's easy to misinterpret that.
Do keep in mind that difference places on earth will most likely be hit at a different magnitude. So some will suffer more than others.
That's a good argument for allowing more migration around the world.