"The four humours for scholars in the Academy of YouTube" - A fascinating idea What would they be, what fundamental underlying phisio/physocological characteri

"The four humours for scholars in the Academy of YouTube" - A fascinating idea What would they be, what fundamental underlying phisio/physocological characteristics of humanity would they describe, and why? How would they help categorize human behavior, assist in understanding decision frameworks and better inform forecasts of future group/individual responses to stimulus? Can we use these tools for improving conditions, or should we simply manipulate others and free them from the burden of spending their money by quietly taking it?