> fights move to other resources

Food (eg. protein, fisheries, etc.), water (eg. dams), materials (eg. rare earths), land, strategic geography, trade, labor, security, political upheaval, power struggles, sectarian violence, terrorism, religion, historical claims, climate, etc. etc. etc.

Under a single global order, disagreements were normally put aside to participate in global trade. As we begin to move to distributed trading blocs and factions, many of these disagreements will boil over. Parties won't step up to stop them.

China is doing really well in solar. Both domestically and globally, because they are providing cheap solar panels to the rest of the world. (Well, apart from those idiots with tariffs to 'protect' them from green energy.)