Which two schools of thought point out that controversies over natural resources may lead to conflict?

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Realism posits that states seek to maximize their own power and security, and that natural resources can be an important source of both. Thus, competition over resources can potentially lead to conflict between states. Radicalism, on the other hand, emphasizes the role of economic and social inequalities in shaping international relations. With regard to natural resources, radical theorists argue that resource distribution tends to favor the wealthy and powerful, which can create tensions and conflicts between different groups within and between states.

Which Two Schools of Thought Point Out That Controversies Over