https://helpfulprofessor.com/world-systems-theory/ College Study Guides. Thu, 09 Nov 2023 23:00:19 +0000 hourly 1 https://wordpress.org/?v=6.9 https://helpfulprofessor.com/world-systems-theory/#comment-4026 Fri, 17 Feb 2023 17:16:34 +0000 https://helpfulprofessor.com/?p=10836#comment-4026 this helped me so much thank you

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