How Words Do the Work of Politics: Moral Foundations Theory and the Debate over Stem Cell Research

Moral considerations underlie partisan and ideological identification along with a variety of political attitudes, yet we know little about how elites strategically appeal to the public's moral intuitions. Building on Moral Foundations Theory, we investigate the causes and consequences of elite moral rhetoric in the debate over stem cell research. Through content analysis of 12 years of coverage in the New York Times, we find that proponents and opponents of stem cell research engage in distinctive patterns of moral rhetoric and place different weight on the foundations. We also demonstrate that the prevalence of moral rhetoric increases during periods of legislative activity, and we find some evidence that moral rhetoric increases in response to the opposing side's use of moral language. Merging our content analysis with seven national surveys, the analysis shows that moral rhetoric has had a substantial effect on public attitudes regarding the fundamental considerations underpinning the debate.