The occurrence of self-fulfilling and self-destroying predictions is an indication of VOLUNTARISM and choice in social behaviour (i.e. that it involves SOCIAL ACTION, which is purposive, in which events get monitored, is capable of reacting to feedback, etc.). Sometimes the fact that this happens is erected into a general principle (sic) that significant sociological generalizations, sociological laws, etc. are not possible in sociology or the social sciences. However, that social participants often have the capacity to change their actions does not mean that they always have this capacity, e.g. 'social structural’ forces may intervene (see also STRUCTURE AND AGENCY). Thus all possibility of successful, non-spurious sociological generalizations is not ruled out by the existence of self-fulfilling and self-destroying hypotheses. See also HISTORICAL GENERALIZATIONS, FREE WILL.