Another Example of Assuming Psychological Causes

Another example of the tendancy to assume environmental or, more commonly, psychological causes, for misfortunes, in this case, illnesses. This one is from a review of Walter Gratze's The Curious History of Nutrition:

Though Gratzer appears more interested in anecdotes than in theory, you can't read this book without spotting a theme: We blame psychology and environment for everything, until science comes up with the real cause. Scurvy, blight of the 18th-century sailor, was attributed to low morale, bad air, and all kinds of other folderol, until it was finally proved to be a vitamin C deficiency.