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Phrenology was (and still is) a pseudoscience with... at CORPORIS FABRICA
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Phrenology was (and still is) a pseudoscience with the false basic premise that the strength of mental faculties was based upon the sizes of various parts of the brain. The suggestion was that the morphology of the skull could be used to estimate the size of brain regions and by extension the mental capability and character of an individual. 

The practice has a dark history of facilitating sexism, racism and hatred towards our fellow humans since its origin in 1796.

This illustration (from How to read character: a new illustrated hand-book of phrenology and physiognomy (1890)) charts the regions once thought to be responsible for various traits and caricatures each.