This paper is motivated by the expectation that developmental idealism has been disseminated to ordinary people and affects family behavior. Developmental idealism is a belief and value system that endorses societal and family development, views societal and family development as occurring together, and suggests that modern families are causes and consequences of societal development. We use data collected in Nepal in 2003 to examine the understandings of ordinary people and show that Nepalis can discuss ideas about development and its relationship to family life and that developmental idealism has been widely disseminated in Nepal. Developmental idealism is related in predictable ways to education, work experience, rural-urban residence, and mass media exposure. Although research ascertaining the influence of developmental idealism on demographic decision-making and behavior would be valuable, we cannot evaluate this with our one-time crossectional data, but our data and theory suggest that this influence may be substantial.