Okay, so what do you suggest is the cause of higher rates of violent crime in the third world, if not inequality and poverty?
My second qualm was with your lack of evidence for such an ungrounded claim. And still it is ungrounded - I can't see any statistics or collected evidence on that page.
You didn't read very far, examples from that page, it's all referenced if you care:
"Sociological positivism postulates that societal factors such as poverty, membership of subcultures, or low levels of education can predispose people to crime. Adolphe Quetelet made use of data and statistical analysis to gain insight into relationship between crime and sociological factors. He found that age, gender, poverty, education, and alcohol consumption were important factors related to crime."
"Henry Mayhew used empirical methods and an ethnographic approach to address social questions and poverty, and presented his studies in London Labour and the London Poor.[10]
"Emile Durkheim viewed crime as an inevitable aspect of society, with uneven distribution of wealth and other differences among people."
"Since the 1950s, social ecology studies have built on the social disorganization theories. Many studies have found that crime rates are associated with poverty, disorder, high numbers of abandoned buildings, and other signs of community deterioration.[13][14] As working and middle class people leave deteriorating neighborhoods, the most disadvantaged portions of the population may remain. William Julius Wilson suggested a poverty "concentration effect", which may cause neighborhoods to be isolated from the mainstream of society and become prone to violence."