Which country can survive on their own without outside resources?

It's challenging to identify a country that can completely survive on its own without outside resources, as most nations rely on trade and imports for various goods and services. However, countries with abundant Natural Resources, such as Russia, could theoretically sustain themselves better than others due to their vast land, resources, and agricultural capacity. That said, the global economy is interconnected, and complete self-sufficiency is rare in the modern world.