1. Ignorance is bliss? How Americans (do not) respond to foreign civilian casualties of war

Americans do respond to casualties of war—when those casualties are American soldiers (Mueller, Reference Mueller1973). While this is not all-encompassing, there are a wide range of conditions under which Americans will become less supportive of war as military casualties increase (see Gartner, Reference Gartner2008 for a discussion). While a vast literature on American responsiveness to military casualties exists, comparatively little work has been done on how the American public responds to civilian casualties of war.

Research examining responsiveness to foreign civilian casualties of war suggests two things: (1) many Americans say that they wish to avoid foreign civilian casualties of war, but (2) actual foreign civilian casualties have a negligible impact on support for war. This was demonstrated during the first Gulf War, where a majority of Americans viewed civilian casualties as unacceptable, but did not demonstrate any response to events where actual casualties occurred (Mueller, Reference Mueller2003). In small-scale military events, Americans ignore considerably large amounts of foreign civilian casualties (Burk, Reference Burk1999). Large pluralities of Americans support the use of force even with a large civilian death toll, and prefer to protect the American military over foreign civilians (Gelpi et al., Reference Gelpi, Feaver and Reifler2009). Most Americans tend to put the welfare of other Americans above that of people from other nations (Page and Bouton, Reference Page and Bouton2008).

Why do Americans not respond to foreign civilian casualty events? One explanation is that the public is simply not aware of civilian casualty events. This argument is compelling—major US news networks devote only a very small amount of time to civilian casualties of war (Aday et al., Reference Aday, Livingston and Hebert2005). Even in the Iraq War, where civilian death tolls were especially high, the Western media tended to avoid reporting these incidents (Kuttab, Reference Kuttab2007). The media also tends to defer to the White House's policy position on foreign affairs, which is unsurprisingly optimistic and does not focus on the risk to foreign civilians (Entman et al., Reference Entman, Livingston and Kim2009). When civilian deaths are reported, this is typically done in a distant, statistical fashion, which fails to induce a strong emotional response to the casualties (Slovic, Reference Slovic2007). Even when civilian casualties are reported, Americans may hold conflicting views on these casualties.

In most foreign policy operations, it is possible that the killing of foreign civilians can be viewed as a means to a noble end; ideally, we would like to avoid the deaths of civilians, but certain goals, such as the removal of an evil dictator, are worth that human cost (Mueller, Reference Mueller2000). This was especially clear after the events of September 11, when Americans were considerably more accepting of civilian casualties in the War on Terror, as the threat to American lives from terrorism was made very real (Mueller, Reference Mueller2003). Americans were generally supportive of the use of the atomic bomb on Hiroshima and Nagasaki, as they were viewed as a means to prevent an even greater death toll (Mueller, Reference Mueller1973).

2. Sanitized language and foreign policy attitudes

I examine two types of language that can be used to influence support for foreign policy intervention. The first is the use of sanitized language. This language is used to reduce human beings to machines or non-living objects (Haslam, Reference Haslam2006). The use of sanitized language denies individuals traits that are essential to human nature—these include characteristics such as vivacity, emotionality, and warmth (Haslam, Reference Haslam2006). Sanitized language should operate by creating feelings of indifference toward the lives of those whose deaths have been sanitized (Bandura, Reference Bandura2002; Haslam, Reference Haslam2006). Because of this, I expect the use of sanitized language toward casualties of war to lead to a lower negative affective response than non-sanitized language, and to lead to more “hawkish” foreign policy attitudes overall.

Sanitization of civilian deaths occurs often during war time. When the media reports on civilian casualties, it is often done with vague language, leaving open the possibility that those killed were not civilians, but enemy combatants (Entman, Reference Entman2006). Reporting on civilian casualties also frequently frames civilian deaths as accidents, or side effects of war (Wheeler, Reference Wheeler2002). Sanitized language frequently is seen as a way to justify conduct that is considered morally reprehensible (Bandura, Reference Bandura2002), and has been used to create the image of clean, surgical wars (Kuttab, Reference Kuttab2007). Through the use of sanitized language, the impact of the deaths of foreign civilians can be minimized in order to increase support for foreign military intervention.

To determine how sanitized language impacts political attitudes, I conducted a question wording experiment, where I varied the use of language to describe foreign civilian casualties of war. This study was conducted in March 2014, using a sample of undergraduates at a private, Southern university.Footnote ¹ In this study, subjects were randomly assigned to one of two groups: a sanitized language group or a non-sanitized language group. Each group received three questions on their attitudes toward civilian casualties of war, and were then asked to what extent they felt upset about the statement they just read. The full text of the questions appears in Table 1. The results of this analysis are presented in Table 2.

Table 1. Treatment question wording (All responses are coded from 1—strongly disagree to 7—strongly agree)

Bolded text indicates changes between sanitized and non-sanitized language groups.

Table 2. How sanitized language influences attitudes and emotional reactions toward civilian casualties of war

Table entries are OLS coefficients with standard errors in parenthesis.

Results include all respondents. Results are robust to including only non-Hispanic white respondents.

*p < 0.1, **p < 0.05, ***p < 0.01.

Various types of sanitizations of casualties of war affect political attitudes. When casualties of war are sanitized by omission, individuals are nearly one point more likely, on a seven-point scale, to agree that the United States should take action to capture al-Qaeda leaders. Even though foreign civilian casualties are a consequence of war in foreign nations, the mention of these casualties makes individuals less likely to support an all-out approach to capturing terrorists. This is a common type of sanitization—elites can simply not mention the consequences of actions to obscure the fact that human lives will be lost.

On the non-combatant targets question, sanitization makes individuals less likely to believe that the US should do everything possible to minimize civilian casualties. Here, the use of sanitized language predicts a roughly 1/4 point decrease in support for the statement. For the collateral damage question, there is no effect of sanitized language on attitudes toward casualties, or the emotional reaction to these casualties. This could potentially be explained by the fact that the term collateral damage was used frequently in the first Gulf War to refer to the deaths of civilians (Bennett, Reference Bennett1994). This provides some evidence that political elites, when using sanitized language, are only able to do so until the sanitization becomes well known by the public.

Sanitized language should operate by creating feelings of indifference toward the target of that language, or through muting the emotional response (Haslam, Reference Haslam2006). To test this prediction, I asked subjects the extent to which they feel upset about the statements that they just read. In both the mention of casualties and non-combatant targets questions,Footnote ² those exposed to sanitized language reported that they were less upset about the statements than those who were exposed to non-sanitized langue. The effect is roughly half a point on a five-point scale for both questions. This serves to explain how sanitized language operates—it causes a weaker emotional response to a person than non-sanitized language, which leads to greater approval of policies that put those people's lives at risk.

Of course, this does not explain how emotional responses are working. It is possible that the sanitized language is serving to mute an emotional response, making individuals feel less upset. It is also possible, and perhaps likely, that non-sanitized language creates a stronger negative emotional response. The important factor here is the difference between sanitized and non-sanitized language.

To examine this effect further, I turn to a mediation analysis of emotional response on these two attitudinal questions, using Average Causal Mediation Effects (ACME) procedures (Imai et al., Reference Imai, Keele and Tingley2010).Footnote ³ The results are presented in Figures 1 and 2. Feeling upset partially mediates the effect of sanitized language on attitudes in the mention of casualties question. Both the indirect effect of feeling upset and the direct effect of sanitized language are statistically significant predictors of belief that the US should do whatever it takes to capture terrorists. It is not surprising that there is only partial mediation, as this type of sanitization also provides less information than in the non-sanitized condition. The non-sanitized condition prompts subjects to think about civilian casualties of war, while the sanitized condition only has them think about “whatever it takes.”

Figure 1. How feeling upset mediates the effect of sanitized language—mention of casualties.

Figure 2. How feeling upset mediates the effect of sanitized language—non-combatant target.

For the non-combatant targets question, the effect of sanitized language is completely mediated by how upset subjects are toward the statement. While there is an indirect effect of sanitized language causing individuals to feel less upset about civilian casualties, there is no remaining direct effect of sanitization. This suggests that certain types of sanitizations may operate more effectively, as the “non-combatant target” sanitization appears to operate completely through muting the emotional response. In this case, sanitized language leads to a weaker emotional response toward the lives of the individuals being sanitized, which leads to less concern about their deaths. Taken together, these findings demonstrate that sanitized language can have a profound effect on attitudes toward civilian casualties of war—when language is sanitized, individuals are less concerned about civilian casualties and have a weaker emotional response to civilian casualties.

3. Dehumanization of the enemy and foreign policy attitudes

Dehumanizing language also serves as a way in which to deny basic human traits to other individuals. Dehumanizing language denies human beings traits that are uniquely human—traits such as the ability to reason that separate human beings from animals (Haslam, Reference Haslam2006). In this instance, the dehumanized group is denied the human trait of cognition (Tipler and Ruscher, Reference Tipler and Ruscher2014). Dehumanizing language, due to the denial of these human traits, is powerful in its own right. However, the relationship between dehumanization and negative attitudes toward outgroups is mediated by a negative affective response, either through disgust (Haslam, Reference Haslam2006), contempt (Esses et al., Reference Esses, Medianu and Lawson2013; Louis et al., Reference Louis, Esses and Lalonde2014), or both (Utych, Reference Utych2018). Dehumanization denies important, human traits to outgroups, and creates an increased negative affective response to these dehumanized groups.

When an individual is dehumanized, they are viewed as less capable of realizing they are being treated poorly, which leads people to prefer harsher punishment of dehumanized individuals (Bandura et al., Reference Bandura, Underwood and Fromson1975). Dehumanized others are assigned low levels of worth, allowing individuals to justify punitive conduct toward those who are dehumanized by disregarding any negative effects of punishment (Bandura et al., Reference Bandura, Barbaranelli, Caprara and Pastorelli1996). In the instance of terrorism, the use of dehumanization against terrorists should lead to attitudes that accept harsher punishment of terrorists, and a devaluation of their lives.

Individuals tend to view groups that are more different than them as more animalistic (Leyens et al., Reference Leyens, Paladino, Rodriguez-Torres, Vaes, Demoulin, Rodriguez-Perez and Gaunt2000). Given that Middle Eastern terrorists do not share a race, ethnicity, or religion with most Americans, they should be easier for White Americans to accept as less than human that less socially distant individuals. Since shared identity may hinder dehumanization (Kteily et al., Reference Kteily, Bruneau, Waytz and Cotterill2015), the lack of shared identity may change how White Americans view terrorists when they are dehumanized. In times of foreign conflict, dehumanization has been frequently used. During World War II, the Japanese were frequently depicted as animals in texts or on propaganda posters (Dower, Reference Dower1986). Dehumanization leads to increased support of torture against terrorism detainees (Waytz and Epley, Reference Waytz and Epley2012). Waytz and Epley (Reference Waytz and Epley2012) argue that socially distant groups, such as terrorists, are easier for individuals to dehumanize. These findings suggest that terrorists or foreign enemies may be especially easy for political elites to dehumanize, and for the mass public to accept the dehumanization.

To examine how language that dehumanizes terrorists influences political attitudes, I conducted an experiment that assigned subjects to read short vignettes. Subjects were assigned to receive either language that dehumanized terrorists, or non-dehumanizing language.Footnote ⁴ This study was conducted in Summer 2014. Participants were recruited from Survey Sampling International's (SSI) survey panel. In total, 1106 subjectsFootnote ⁵ participated in this portion of the study. Only non-Hispanic whites who are US citizens and do not report having an immediate family member serving in the military were recruited for this study. This is a nationally diverse, though not nationally representative, sample.

Here, subjects were randomly assigned to one of two groups: one that described terrorists using non-dehumanizing language, and one that described terrorists using dehumanizing language. The full vignette text presented to subjects is as follows:

Results of the analyses for this study are presented in Table 3.Footnote ⁶ When terrorists are dehumanized, individuals are about 0.30 points more likely to support military intervention against terrorists. This effect is about 22 percent of the effect of moving across the scale of ideology.

Table 3. How dehumanizing language influences attitudes toward terrorism

Table entries are OLS coefficients with standard errors in parenthesis.

Data excludes any participant who read the five sentence treatment in <10 s, or rated the text in the bottom 10 percent of all subjects in terms of believability.

*p < 0.1, **p < 0.05, ***p < 0.01.

Further, those presented with dehumanizing language are also more likely than those who are not to believe that terrorist's lives are less valuable. Subjects were asked two questions related to the lives of terrorists. The first question asks to what extent subjects agree with the statement “When someone engages in terrorism, they have forfeited their right to life.” Here, subjects in the dehumanization treatment are about a quarter of a point more likely than those who are not to agree with the statement. Subjects are also asked the extent to which they agree with the statement “The military should kill known terrorists, rather than capture them and try them in court.” The effects here are similar, just over a quarter of a point on the scale, with those in the dehumanizing treatment more likely to agree with the statement. Taken together, this set of results suggests that individuals are more likely to be supportive of action against terrorists, and more likely to disregard the value of their lives, when they are presented with language that dehumanizes terrorists.

Dehumanizing language should operate through increasing disgust or anger toward the dehumanized individual. I do not find evidence, however, that the dehumanization treatment led to increased feelings of either emotion. The mean levels of disgust were 4.24 for the treatment, and 4.26 for the control (p = 0.73), while the mean levels of anger were 4.21 for the treatment, and 4.13 for the control (p = 0.30). While individuals do not appear to be responding to the dehumanization treatment with disgust or anger, the overall levels of these negative emotions are very high.Footnote ⁷ This suggests that this mechanism may already be operating, and simply cannot be further activated by dehumanization.

While the effects of dehumanization on attitudes are small, this is in line with other studies using language manipulations to study dehumanization (Utych, Reference Utych2018; Utych, Reference Utych2020). Other factors certainly influence attitudes toward terrorists more than dehumanizing language, but there is a small effect, even on a group that is nearly universally loathed. Further, the high levels of anger and disgust toward terrorists suggest that they may already be dehumanized. Since these are the mechanisms through which dehumanization often operates (Haslam, Reference Haslam2006), it is unlikely that dehumanizing language may have a strong additional effect. Indeed, previous work has shown that political elites frequently talk about terrorists in dehumanizing terms (Utych, Reference Utych2014), suggesting that this dehumanization of terrorists may be chronic.

4. Summary and conclusions

Sanitized and dehumanizing language both influence how individuals view foreign policy intervention and casualties of war. When presented with sanitized language, individuals were less concerned about civilian deaths in military interventions, and they reported lower feelings of concern about the deaths of civilians, which mediate the effect of sanitized language on attitudes. Dehumanization causes individuals to be more supportive of military intervention, and be more accepting of the deaths of terrorists, rather than their capture and trial.

This research has implications for scholars of public opinion. The language used to talk about political issues has an impact on public attitudes about these issues (Zaller, Reference Zaller1992). If war is often described in clean, sanitized terms, this should lead to increased public support of foreign conflict. If war is described in ways that dehumanize the enemy, this will also lead to an increase in public support. These two rhetorical techniques can both serve to minimize the cost of human life in war.

Of course, this study is not without limitations. The study on dehumanization had large issues with non-compliance of respondents, perhaps leading to underestimation of effect sizes. Additionally, it is hard to compare the effects of dehumanizing and sanitized language based on these results, given that the samples were quite different—a nationally diverse sample for the dehumanization study, and a student convenience sample for the sanitized language study. These studies also differed in mode, with students completing the study in a lab, while the nationally diverse sample completed the study online. Future work is needed to compare the relative effects of dehumanization and sanitization.

In the area of foreign policy intervention, the lives of foreigners are routinely put at risk. I find that the language used to discuss foreign intervention can have an important impact on political attitudes toward intervention. By using language that sanitizes casualties, or dehumanizes an enemy, political elites can garner increased support for military intervention. When the public reacts to casualties in foreign policy, it seems to matter not only what they learn, but what words are used to convey those messages.