In this paper, I interrogate an ethical obligation to participate in genomics research on the basis of solidarity. I explore two different ways in which solidarity is used to motivate participation in genomics research: as an appeal to participate in genomic research because it cultivates solidarity and as an appeal to participate in genomic research because it expresses solidarity. I critique those appeals and draw lessons from them for how we ought to understand solidarity. The working definition of solidarity that (...) I defend is that solidarity involves recognizing another creature, person, or persons as, like ourselves, vulnerable to injustice and entails acting in ways that contribute to creating, reforming, and participating in institutions that are aimed at enhancing their flourishing. I argue that participating in genomics research is not an expression of solidarity. Participation in research may be praiseworthy, a “good thing to do,” but actually cultivating and expressing solidarity requires much more of us. (shrink)