This study presents a scoping and bibliometric review of literature on inclusion, diversity, equity, and accessibility (IDEA) in collection development within libraries, covering the period from 2001 to 2025. Drawing on 114 Scopus-indexed articles, it maps publication trends, identifies key contributors, analyzes methodological approaches, and uncovers dominant themes through keyword co-occurrence and citation networks. Findings highlight a steady growth in IDEA-focused research, especially in academic libraries, with a strong emphasis on qualitative methods such as case studies and theoretical analyses. Three thematic clusters emerged: IDEA integration in collection development, accessibility in public libraries, and foundational IDEA concepts. Notable gaps include limited global representation, lack of standardized assessment tools, and underrepresentation of community voices. The study recommends expanding research to underrepresented regions, developing scalable evaluation frameworks, and adopting participatory approaches. These insights offer a roadmap for advancing inclusive, equitable, and user-centered collection development practices in diverse library contexts.
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