Which theoretical approach claims that rich nations of the world are "overdeveloped" while poor nations are "underdeveloped"?

The dependency theory asserts that rich countries of the world should be "overdeveloped" while poor countries should be "underdeveloped". Reliance hypothesis is the thought that assets spill out of an "outskirts" of poor and immature states to a "center" of rich states, enhancing the last to the detriment of the previous.