The recent shift in social science research toward philosophies of the more-than-human has pushed many scholars to question their understanding of units of analysis and agency. While many engage with agencies of the material, few have attempted to address what might be called the agency of ideas. Here, Alexander Pratt argues that engaging with the agency of ideas is particularly important when dealing with issues like racism, which is the focus of this article. He believes that one reason for the lack of such engagement is the seemingly undefined nature of what we might think of as ideas. In this article, Pratt offers a conception of agential ideas developed through his reading of the metaphysics of Charles S. Peirce and those who have utilized Peirce's theories. This conception will provide an entry point for posthuman researchers to incorporate the protean nature of ideas into their own research methodologies.