far be it for me to question your prophetic capacities. i wonder, do you have any historical examples or logic-based arguments that our doom of nigh?

Oil (diesel), gas and fertilizer is the backbone of the worlds agriculture. With shortages of all 3 the food production goes down dramatically. Even if the war ends today it will take years to bring back production to previous levels. In my opinion the effects will start showing up in food prices in the next few weeks once food producing countries realize the food shortages could happen they will start restricting exports.