The document discusses theories of core-periphery relationships and development disparities between countries and regions. It provides examples of how Malaysia exhibits a core-periphery structure with the more developed urban core centered around Kuala Lumpur and the less developed rural periphery of states like Sarawak. Government policy has promoted industrialization in the core through foreign investment and export processing, creating unequal prosperity and internal divisions. While tourism development provides income, it risks environmental degradation if not managed sustainably.