The Association of Research Libraries' diversity initiatives, under the leadership of Duane Webster and member libraries, have had a visible and long-lasting influence on the makeup of academic librarianship. ARL's accomplishments and progress in advancing diversity comprise important milestones for librarianship and did not come without discussion and, at times, lively debate. Ultimately, the conversations about diversity in higher education and research libraries continue to encompass a broad range of diversity-related initiatives infused into the culture of libraries, research, teaching, and learning. (Contains 12 notes.)