Black Lives Matter gained elevated levels of support following the death of George Floyd at the hands of the Minneapolis Police Department. Despite temporary elevated levels of support, large segments of the populous are still reluctant and critical of the movement. This work aims to assess what role notions of respectability politics play in Black American support of Black Lives Matter. Respectability politics is consistently weaponized against members of oppressed groups including racial minorities, women, the LGBTQ community, and their related social movements. Analyzing the role of respectability politics in this context is a needed addition to the scholarly literature regarding social movement mobilization, as well as the interdisciplinary literature that has previously examined respectability in myriad forms. I hypothesize that unwillingness to support Black Lives Matter will be dependent on respectability politics as it relates to the perceived comportment and behavior police violence victims. This work included experimental analysis of the perceived respectability of a police brutality victim's "respectable" behavior being varied in the experimental treatment. I found support for my primary hypotheses that adherence to respectability politics correlated with diminished support for Black Lives Matter.

Audience costs, which are defined as political costs for a leader generated when the leader fails to follow through on international commitments, are an important concept in international relations to understand the causes of war and peace. However, despite its prominence, evidence for audience costs is mixed at best. In this dissertation, by conducting a series of survey experiments in the United States, I examine a variety of causal mechanisms and observable implications of audience cost models. In Chapter 2 I explore the role of the media. The result of a survey experiment shows that the media's negative framing of a leader's backing down from a threat increases audience costs, but only after subjects are informed of the leader's justification. Chapter 3 tests the idea that the magnitude of audience costs depends on an individual's personality traits. A pilot experiment using a sample of undergraduate students does not support this expectation. Lastly, I compare the credibility of public versus private threats in Chapter 4. A conjoint survey experiment demonstrates that as many proponents of audience cost theory suggest, public threats are perceived as more credible, and the sources of their credibility are domestic audience costs.