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The narrative emphasizes John D. Rockefeller’s strategic reduction of oil transportation costs—dramatically shifting the industry landscape. Rockefeller didn’t just happen upon wealth; he revolutionized oil shipping by pioneering the use of tank cars, making transportation cheaper and more efficient than traditional barrel shipping methods. This innovation allowed him to offer lower prices, which not only gained him a monopoly but also benefited consumers by reducing prices across the board. His beneficiaries weren’t just the wealthy elite but the general public who could access cheaper oil.