Aspects of this topic are discussed in the following places at Britannica.
A person with this disorder has a grandiose sense of self-importance and a preoccupation with fantasies of success, power, and achievement. The essential characteristic of this disorder is an exaggerated sense of self-importance that is reflected in a wide variety of situations. The sense of self-worth exceeds the individual’s actual accomplishments. People with this disorder are typically...
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