From another point of view, toleration is essential to completion. The enormous variety of character, and ability for special work, is all needed in a complete community. There are many "wrong paradises" in a whole society. We see the necessity for mental diversity, from the pure mathematician who is proud of the inapplicability of his results, through all the successive stages of research work, commercial work, administrative management, and mechanical work, even down to merely automatic work which needs no more mind than a cow's. And it is perfectly clear that such mental diversity must have corresponding variety of external life to accommodate it. The student or experimental worker finds the disturbances of communal life almost insufferable, while the mechanical worker would be miserable almost to suicide in the silence and lack of excitement of a life devoted to abstract thought or to millionths of an inch. If, therefore, the productions of the externals of life differ so profoundly in a complete society, we must expect and allow equally great differences in all the feelings, instincts, and requirements. One man may have a physical repulsion to affecting his mind and condition by stimulants and narcotics, a repulsion that extends more or less to every one addicted to such drugging of the senses. But it would be a misfortune to be without that variety, and the world would be poorer by losing Falstaff, or even Bardolph. The utmost we can say is that we should never be blind to the bad effects on the community of a low type if it be too widely diffused.