Meanwhile, the tax-exempt status of nonprofits, funding for higher education institutions, and the tax status of philanthropic endowments are falling under threat. In recent months, many foundations and donors have spoken out against government funding cuts or announced increases in their giving. This collection of articles, developed in collaboration with the team at the John D. and Catherine T. MacArthur Foundation, aims to help philanthropists and their partners think through the choices before them. Contributors include leaders and thinkers from a wide variety of funding institutions, beginning with MacArthur Foundation President John Palfrey. This series appeared in SSIR’s Fall 2025 Issue, including a new follow-up essay from MacArthur Foundation President John Palfrey.