CASSE was founded as a U.S.-based nonprofit organization by Brian Czech in 2004 to refute the dangerous rhetoric that “there is no conflict between growing the economy and protecting the environment.” Working with colleagues in several professional scientific societies, Brian crafted a scientifically sound position on economic growth that can be signed by individuals and endorsed by organizations. With their position statement, the work of dedicated staff and volunteers around the world, and the development of numerous information resources, CASSE has become one of the leading organizations promoting the transition from unsustainable growth to a steady state economy. TreeHugger, by far one of the largest environmental blogs, named CASSE as the Best Green Think Tank in their Best of Green 2011. To quote Treehugger:

And in all honesty awarding the Center for the Advancement of the Steady State Economy a Best of Green Award this year is as much about promise as past action.
When it comes down to advocating for what we humbly submit to TreeHugger readers as the single most important economic concept of the 21st century, CASSE comes out on top. We highly urge you to look into their work.

Image Credit: Polyp