Alkire, Sabina (2010). "Human Development: Definitions, Critiques, and Related Concepts" Human Development Research Papers (HDRPs): Thematic Research on Key Issues and Concepts of Human Development United Nations Development Programme New York 2010/01 pp. 1-96

The purpose of this background paper is: i) to synthesize the discussions regarding the concept of human development, so as to inform the 2010 Report’s definition, and ii) drawing on the extensive policy and academic literatures, to propose relationships between the concept of human development and four related concepts: the Millennium Development Goals, Human Rights, Human Security, and Happiness. Inequality, the duration of outcomes across time, and environmental sustainability are also prominent due to their fundamental importance.