The Association of Research Libraries (ARL), representing 125 member organizations in Canada and the United States, has joined the Coalition for Diversity and Inclusion in Scholarly Communications (C4DISC). ARL members are trusted sources of scholarly information and data, and constitute a significant share of the academic publishing market. A growing number of research libraries run their own publishing programs, house or partner with university presses, and collaborate with emerging scholar-led presses. The Association is proud to join publishing colleagues in C4DISC as part of a commitment to better understand the causes of, and to advance remedies for, racial inequity in scholarly communication. In joining, ARL endorses the C4DSIC Joint Statement of Principles.