Most businesses are built on a linear model: take, make, and discard. But that norm is reaching its limits, and leaders are under pressure to find smarter, more sustainable ways to operate. Weslynne Ashton is a systems scientist and professor at the Illinois Institute of Technology. In her masterclass at HBR’s 2024 Leaders Who Make a Difference conference, she explains how companies can shift to a circular economic strategy. One that reduces waste, reinvests in communities, and creates long-term value. She shares how businesses around the world are rethinking products, partnerships, and growth itself to build more resilient, regenerative business models.