AACR2R has weaknesses that make it unprepared for the 21st century. It leaves catalogers to make judgments without guidance, uses confusing language, and cannot adapt to new formats. RDA is proposed as an alternative that provides more support for catalogers, uses clear language, and is designed to catalog current and future formats like digital resources, websites, and streaming media. RDA will replace AACR2R and better serve the needs of modern libraries and their users.