The causes of economic underdevelopment, and unequal distribution of wealth among states.

International Relations scholars appear to disagree on the causes of economic underdevelopment, and unequal distribution of wealth among states. Neo-Marxist scholars explain these inequalities through a systemic theory, focusing on a world system that benefits some states disproportionally. Others argue that the causes of economic underdevelopment are to be found in unit-level attributes. Which of these two examples do you find most compelling? Why?