In "The Behavior of Law", published in 1976, Donald Black introduced the first example of pure sociology—a general theory of law, or governmental social control. This theory seeks to explain variation in law, and one aspect of legal variation is the amount of law attracted to a case of conflict. A conflict is a situation where one person has a grievance against another, such as where an assault has occurred or a contract has been broken, and the offended parties may or may not appeal to the police or to the civil courts to resolve it. Cases may attract law or not, then, and when they do attract law, there may be more or less of it. When the police make an arrest in an assault case, for instance, there is more law when there is merely a call to the police, and when someone is convicted and sentenced there is more law than when there is merely an arrest. The pure sociology of law explains this variation by identifying a number of sociological variables that are associated with variation in the quantity of law. These include various forms of social status (such as wealth, integration, culture, conventionality, organization, and respectability) as well as various forms of social distance (such as relational distance and cultural distance). These are aspects of the social structures of cases, then, and so cases where the disputants are both high in status have different social structures—and are handled differently—than cases involving low-status disputants. Whether the disputants are socially close to or distant from one another also determines the amount of law the case attracts. For example, one of the theory's predictions is that within a society, law varies directly with relational distance. Relational distance refers to the amount and intensity of interaction between the parties, so the theory predicts that there is more law in conflicts between strangers than in those between intimates. This aspect of the theory explains numerous facts, such as why those who kill strangers are punished more severely than those who kill intimates and why women who are raped by strangers are more likely to report it to the police."