Brief Lesson From the Russia-Ukraine War

From a strategic perspective, the US must maintain 3 things: ability to produce enough food and energy to survive, and to deliver nukes. You see the value of this right now for Russia - they cannot be strangled economically because they have food and energy and no one will invade them and risk nuclear escalation. Note - China imports both food and energy - they cannot produce enough internally to feed or move their own population. This is a strategic disadvantage for them.