Islamic environmentalism is an intellectual movement whose representatives discuss contemporary environmental problems in the language of Islamic theology. This field includes Shariah-based environmental law, environmental activism, and environmental philosophy. This article is an overview of the genealogy of this philosophical trend: key names will be listed and their contributions to the development of this movement will be analyzed. For example, the legacy of Sayyid Hossein Nasr, considered the founding father of Islamic environmentalism, will be examined in detail. The religious and ethical program of this philosophical movement will be analyzed in detail. The categorical apparatus to which Islamic eco-activists, philosophers, and ulema turned as the Islamic environmental agenda expanded will also be examined, such as how the concepts of khalifa, hima, and misan were conceptualized. Philosophers whose writings we will turn to include Iraqi philosopher and jurist Mawil Izzi Dien, British eco-activist Fazlun Khalid, Egyptian Grand Mufti Ali Jumaa, and representatives of so-called “Western Islam” Ziauddin Sardar and Tariq Ramadan. The example of Indonesia will be used to examine how Islamic eco-theology has formed the basis of a multilevel environmental policy. The thesis of the fundamental contradiction underlying Islamic environm entalism is put forward. On the one hand, this movement in its present form genetically dates back to the European protest movements of the 1960s and 70s, which opposed the culture of mass consumption, impersonal materialism, and overproduction. On the other hand, an equally important part of the rhetoric of a number of Islamic modernists, including on ecology, is the emphasis on the break with Western neoliberal values. The special role of social media in the promotion of Islamic eco-activism is noted separately.