The fundamental conflicts and contradictions between environment and development, and various theoretical and practical efforts to reconcile them, have been a prominent part of the history of development thinking since environmentalism emerged as a significant political phenomenon in the 1960s. The idea of development as change for the better resonates perhaps with all civilizations and across time. All civilizations have development myths which reflect a self-awareness that a particular culture had at some time in the past advanced from a more primitive, less developed state. But these cultural myths of development are only incidentally material or economic. More pronounced concerns over the environment and development emerged during the 1960s and the 1970s. These decades were marked by the emergence of widespread public concern about environmental problems of air and water pollution, and the growth of the environmental movement led to national environmental policy developments and international efforts on the environmental front. In addition, development, environment, and sustainability are all normative concepts with implications for ethics and justice. The vast literature on sustainable development has spawned a range of critiques from a variety of theoretical and disciplinary perspectives. The environmental justice literature developed after early sustainable development literature, and raises questions about intragenerational equity.