sentences:  They provide more than potential constraints on action possibilities.They also generate opportunities for social actors to behave in ways that would otherwise be impossible, for instance, to coordinate with others, to mobilize and to gain systematic access to strategic resources, to command and allocate substantial human and physical resources, and to solve complex social problems by organizing collective actions.In guiding and regulating interaction, social rules give behavior recognizable, characteristic patterns, and make such patterns understandable and meaningful for those who share in the rule knowledge.