Stephen is a professor at a university. He tells his students that rich countries continue to stay rich because they control the economies of poor countries. He also states that they exploit the poor countries because workers in poor countries depend on external markets for jobs. He argues that rich countries set prices for agricultural products exported by poor countries regardless of market values. Which theory is he describing to his students

​World-system theory

Explanation:

​World-system theory are various approach to how past events in the world played out alongside social changes and it's impact on the people.

They are many claims the rich make their wealth off the poor, many of those claims could be true, as we are surrounded with a few rich and many struggling person's in the society. These theories and many more which tell how past events play out is known to be ​World-system theory.