ethnicity, and family status. This theory's primary focus is on juvenile delinquency. Organized crime: a business that supplies illegal goods or services, including sex, drugs, and gambling. This type of crime expanded among immigrants, who found that society was not always willing to share its opportunities with them. A famous example of organized crime is the Italian Mafia. See also Sociological imagination Index of sociology articles List of sociologists Bibliography of sociology List of sociology journals Branches of sociology Timeline of sociology History of the social sciences References Notes Citations Introductory reading Adams, B. N., and R. A. Sydie. 2001. Sociological Theory. Pine Forge Press. Bilton, T., K. Bonnett, and P. Jones. 2002. Introductory Sociology. Palgrave Macmillan. . Babbie, Earle R. 2003. The Practice of Social Research (10th ed.). Wadsworth: Thomson Learning. . Goodman, D. J., and G. Ritzer. 2004. Sociological Theory (6th ed.). McGraw Hill. Hughes, M., C. J. Kroehler, and J. W. Vander Zanden. 2001. Sociology: The Core. McGraw-Hill. . Lay summary (chapter 1). Germov, J. 2001. "A Class Above the Rest? Education and the Reproduction of Class Inequality." Pp. 233–48 in Sociology of Education: Possibilities and Practices, edited by J. Allen. Tuggerah, NSW: Social Science Press. . External links American Sociological Association - Section on Theory European Sociological Association: Social Theory Research Network (RN29) International Sociological Association: Research Committee on Sociological Theory (RC16) Sociological Theory [academic journal]. Teng Wang, Social Phenomena Sociological terminology Philosophy of social science