Just placing my thoughts here, based on current information to hand, written in past tense based on prior learned information.

During the early portion of the 21st century, growing discontent with increasingly erratic weather patterns resulted in political chaos. The two sides concerned in each case and nation wished for action, one for action by addressing the problem, the other by ensuring their economies would survive at "any" cost. This schizophrenic approach ultimately resulted in the election of demagogues, where they would attempt to address the problems of the populace through piecemeal adjustments which would never be enough to address the underlying problems causing the disintegration of civilization. To the background of an ever increasingly unstable climate, this resulted in an economic war that would culminate in a physical confrontation between the major powers of the era, and their vassal states. At a later point in time, this would become known as "the war of contracts", an artificially created situation that would allow the entrance of third-parties. The result of that time is still undefined.

2020, 2022, 2025. If you're not prepared before 2020, you'll never be prepared.