The opinions expressed here by Trellis expert contributors are their own, not those of Trellis. Regarding climate change, we keep failing to act at scale because we keep treating it as a complicated problem when it is, in the academic sense, a wicked one. And wicked problems don’t yield to the tools we’re using. Let us explain. In 1973, academics Horst Rittel and Melvin Webber published a paper we often recommend to impact investing and sustainability students and professionals.