Boredom as a factor in human behaviour has received, in my opinion, far less attention than it deserves. It has been, I believe, one of the great motive powers throughout the historical epoch, and is so at the present day more than ever. Boredom would seem to be a distinctively human emotion. Animals in captivity, it is true, become listless, pace up and down, and yawn, but in a state of nature I do not believe that they experience anything analogous to boredom. Most of the time they are on the look-out for enemies, or food, or both; sometimes they ...