The long-standing view in psychology is that positive emotions are conducive to creativity because they broaden the mind, whereas negative emotions are detrimental to creativity because they narrow one’s focus.
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research conducted by psychologist Eddie Harmon-Jones and his colleagues suggests that the critical variable influencing one’s scope of attention is not emotional valence (positive vs. negative emotions) but motivational intensity, or how strongly you feel compelled to either approach or avoid something.
WWI is a romantic war, in all senses of the word. An entire generation of men and women left the comforts of Edwardian life to travel bravely, and sometimes even jauntily, to almost certain death. At the very least, any story or novel about WWI is about innocence shattered in the face of experience.