The Greek word “nostalgia” derives from the root nostros, meaning “return home,” and algia, meaning “longing.” Doctors in seventeenth-century Europe considered nostalgia an illness, like the flu, mainly suffered by displaced migrant servants, soldiers, and job seekers, and curable through opium, leeches, or, for the affluent, a journey to the Swiss Alps. Throughout time, such feeling has been widely acknowledged. The Portuguese have the term saudade. The Russians have toska. The Czechs have litost. Others too name the feeling: for Romanians, it’s dor, for Germans, it’s heimweh. The Welsh have
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