Every day in the United States, over halfa million social workers provide services to people with health, mental health, and substance abuse problems in a fragmented system that emphasizes disease treatment over prevention. Powerful issues--including health inequities, population aging, globalization, natural disaster, war, and economic downturn--make the need for preventive approaches more critical than ever. Despite social work's historic commitment to enhancing human well-being and public health involvement, little is known about how social work currently views prevention or whether it is being addressed in the social work professional literature. To determine whether, and to what extent, prevention is addressed, discussed, and published in social work journals, the authors--all public health social work researchers-undertook a content analysis of nine peer-reviewed journals, analyzing all articles published from 2000 to 2005. A total of 1,951 articles were reviewed and coded for prevention according to specified criteria. A relatively small number--109 (5.6 percent)--were found to meet the criteria for being a prevention article, suggesting that prevention is still a minority interest area within social work.A renewed conversation about prevention in social work can enhance opportunities for strong social work participation in the transdisciplinary collaboration needed in this new era of health reform.