In the US, John T. Lyle started developing ideas on regenerative design that could be applied to all systems, i.e., beyond agriculture, for which the concept of regeneration had already been formulated earlier. Arguably, he laid the foundations of the circular economy framework, which notably developed and gained notoriety thanks to McDonough (who had studied with Lyle), Braungart and Stahel. Today, the Lyle Center for Regenerative Studies offers courses on the subject.