Violence has become a matter of major public concern in Australia in recent years. Two separate massacres in Melbourne in 1987 and one in Sydney in 1991— each by a lone gunman— horrified the nation and reinforced the view of many that Australia is becoming a more violent and lawless country. Anecdotal evidence and systematic survey data both confirm that fear of random, unprovoked violence from strangers now has a major effect on the lives of many ordinary Australians (van Dijk, Mayhew & Killias 1991). However, criminological research (see Australia 1990) suggests that most acts of interpersonal violence are not the result of random attacks by madmen on complete strangers, but involve ordinary people as both attackers and victims who freque...