We have now found out that many things which we felt to be basic realities of nature are social fictions, arising from commonly accepted or traditional ways of thinking about the world. These fictions have included: 1.  The notion that the world is made up or composed of separate bits or things. 2.  That things are differing forms of some basic stuff. 3.  That individual organisms are such things, and that they are inhabited and partially controlled by independent egos. 4.  That the opposite poles of relationships, such as light/darkness and solid/space, are in actual conflict which may result in the permanent victory of one of the poles. 5.  That death is evil, and that life must be a constant war against it. 6.  That man, individually and collectively, should aspire to be top species and put himself in control of nature. Fictions are useful so long as they are taken as fictions. They are then simply ways of “figuring” the world which we agree to follow so that we can act in cooperation, as we agree about inches and hours, numbers and words, mathematical systems and languages. If we have no agreement about measures of time and space, I would have no way of making a date with you at the corner of Forty-second Street and Fifth Avenue at 3 P.M. on Sunday, April 4.