but at least we will have alternative energy sources in Solar, wind, batteries and probably a Nuclear renaissance which might reduce the incentives on fight for Oil & Gas even if the 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.