The neologism ecopedagogy was coined in the late 20th century to represent the joining of ecology and pedagogy. However, ecopedagogy is not an education about ecology but an education through ecology, meaning that it is an education based on an ecological worldview. A worldview is the fundamental understanding of life and the world. Ecological worldview means the ecological approach to the understanding of life and the world. The basic ideas of the ecological worldview come from the science of ecology, of which there are two interpretations: ecology of stability and ecology of instability. Both provide a general, shared outline of the world and how it works but each offers distinctive values of philosophy, ethics, culture, and society with regard to the ecosystem. Ecopedagogy, which encompasses both ecological worldview and education, develops into two broad movements: philosophical ecopedagogy and critical ecopedagogy. For the former, referred to as ecosophy, focuses on the metaphysical investigation of the human-nature relationship and related issues in education. For the latter, ecojustice, the mission is to critique the injustice and oppression involved in environmental issues and to construct a utopian society of planetary civilization.