Most of our technical problems comes down to energy requirements; we need to replace most of the world's current electrical usages, we need to replace the world's oil and gas driven transportation structure with electric, we need to replace our natural gas derived fertilizer with air and water derived fertilizer (which costs 100x the energy to produce at best), and that along with the millions of other fossil-fuel derived chemical reagents and materials that don't get counted in most energy requirement surveys, we need to scrub out 200+ years worth of pollution in the air and also the oceans (which has absorbed most of our CO2, hence the acidification), and still accommodate for future increases in energy requirements across the globe.
Quite simply, even if we doubled or tripled our energy production rates tomorrow and it was magically all clean power, we still wouldn't be anywhere near the power requirements we need to build a clean society, and that is before we even start looking at serious CO2 sequestration. It will always take more energy to sequester CO2 than burning the old fuel could ever theoretically produce, and we only harness between 20-50% of the energy released from those fuels even today, with the rest escaping as waste heat, so we have a LOT of extra energy to make up for.
So, break a nation? Climate change broke a few already.
The EU governments are already making it hard for refugees to cross the Medditerranean (financing the Libyan Coast Guard to stop "smugglers", as well as camps in Turkey), although all the Neo-Nazis still scream about it, I can imagine that when more right wing governments get voted to "represent" the populace, they'll take even more drastic measures (even more than the Italian government refusing docking rights to ships which rescue refugees).
You only have to take one look at Egypt demographics to understand Arab (counter-)revolution(s) are inevitable.
https://www.ined.fr/thumb/?q=90&w=1027&h=768&src=/fichier/s_...
This is a desert country, bankrupt for 20 years, and dependent on foreign dollar aid to buy food.
Syria is a vicious civil war, with a minority governing sect fighting for its life against an abused majority.
After 7 decades of democratic progress in the EU, there are bound to be push backs. Is the Brexit insanity related to climate change?
Well-managed China will leverage Green Tech as an economic opportunity. Mis-managed countries will sink lower. Sad but true.
Interesting point about China, do they have a refugee crisis? I suppose being seen as an oppressive regime not scared to shoot at people has its advantages. (I'm a "refugees welcome!" kind of person, although I'm sure the society I live in barely tolerates them, and the situation will not improve.).