In 1985, German sociologist Niklas Luhmann published a monograph on ecology, which appeared in English translation in 1989 as Ecological Communication. It contained many original insights for ecological thinking and, despite being well-reviewed upon publication, has had a relatively minor impact on Anglophone environmental discourse. This inattention is also present in environmental law, which has recently seen an increase in legal theories that challenge its mainstream. This contribution first investigates why Ecological Communication has received scant attention, pointing to changes in (...) the climatic context in which it first appeared and the reactionary nature of its arguments. Recognising that the work nevertheless contains critical theoretical insights for environmental law scholarship, the second aim of the article is to spotlight what from Ecological Communication remains relevant at the hand of three common claims progressive researchers level against mainstream environmental law: The critique of law's marriage to Cartesian dualism, that law should be better informed by climate science,of and law's anthropocentrism. Finally, environmental lawyers are called upon not to ignore Ecological Communication but to engage with it fruitfully. (shrink)