This article presents a critical analysis of the principle of the least restrictive environment (LRE). The article begins with a review of the origins of LRE in professional writings and law and moves next to a discussion of how LRE has been operationalized in terms of a continuum of residential, educational, and vocational services. Building on previous critiques of the continuum concept, the author presents seven conceptual and philosophical flaws or pitfalls in the LRE principle itself, especially when it is applied to people with severe disabilities. The author then argues that an uncritical acceptance of LRE may lead to the establishment of a "new" community-based continuum and takes the position that many leading writings in the field can be interpreted to legitimate this new continuum. The conclusion of the article supports an unconditional commitment to integration and briefly contrasts integration with LRE as a guiding principle for the design of services and support for people with developmental disabilities and concludes with a note on the importance of viewing concepts in historical context. (Contains 2 figures.)