The concept of ‘humors’ was prevalent in large swathes of the globe for nearly two thousand years. What do you infer was the reason for its unprecedented popularity? 1. From ancient Egypt, Mesopotamia and India medicine was an area of interest. Dhanvantan in 2000 BC and Hiprocrates in 3BC described four basic elements making up man and solutions to ailments arising due to imbalance. These worked and served too well for 1600-1700 years!