Most of what relationship science has learned about intimate relationships is based on research conducted with white, affluent, college-educated samples. That becomes a problem when the results of that research are used as a basis for interventions with couples are not white, not affluent, and not college-educated. To broaden the scope of this literature, this talk describes a program of research on diverse couples recruited from lower-income neighborhoods. The results of this work demonstrate that, while some of the conclusions of research on affluent couples generalize to lower-income couples, some do not, and others are flipped entirely. One implication of this work is that the context of our phenomena change those phenomena, and we as researchers have to be cognizant of those effects. Another is that understanding the implications of our research requires that we keep in mind who exactly it is that we are studying.