Final answer:
A rise in global temperatures can lead to vast social upheaval and fighting for resources. This can happen through the disappearance of coastal ecosystems and human communities, the increase in political instability due to poverty, and the triggering of resource disruptions.
Step-by-step explanation:
A rise in global temperatures can lead to vast social upheaval and fighting for resources. As temperatures rise, glaciers and polar ice melt at a faster rate, causing global sea levels to rise. This could result in the disappearance of coastal ecosystems and human communities.
Additionally, political instability due to poverty is likely to increase as poverty rises throughout the world because of climate change and war. This could further escalate social conflicts and resource competition.
Moreover, resource disruptions can trigger market crashes and global military actions, leading to significant social turbulence and conflicts.