I recently read a book by an author who insists that everything man does is economically motivated. Leaders launch wars of conquest in order to capture the wealth of other nations. Scientists do research in order to receive grants or find marketable processes. Students go to college to get better jobs. He even maintains that people go to museums to become better informed on the off-chance that some day they will be able to turn that knowledge to their advantage. So persuaded was I by the author's evidence that, applying his theory on my own, I was able to conclude that he had written the book __________. Which of the following provides the most critical completion of the above paragraph?
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