The answer is positional inequality.
Most nations operate in the capitalist system of production and consumption.
Since the end of the feudal system, the world underwent transformations that culminated in economic systems based on barter and mercantilism, which in turn allowed for the existence of industrial revolutions and which were the basis for the capitalist system of production as it is today.
In last century, Capitalism and communism competed for world hegemony until the end of the Cold War, when the bipolarized world gave way to what today times capitalist hegemony in most countries with a few countries in communist systems.
