At every moment of life the civilised man is hedged about by restrictions of impulse: if he happens to feel cheerful he must not sing or dance in the street, while if he happens to feel sad he must not sit on the pavement and weep, for fear of obstructing pedestrian traffic. In youth his liberty is restricted at school, in adult life it is restricted throughout his working hours. All this makes zest more difficult to retain, for the co ntinual restraint tends to produce wearin ess and boredom. Nevertheless, a civilised society is impossible without a very considerable degree of restraint upon spontaneous
impulse, since spontaneous impulse will only produce the simplest forms of social c ooperation, not those highly complex forms which modern economic organisation demands

Author: Bertrand Russell