This article challenges the traditional philanthropic focus on “sustainability” and introduces a more powerful concept: “durability.” Drawing from Tom Klaus’s insights, it argues that while sustainability aims to maintain programs with ongoing funding, durability ensures organizations are built to last, adapt, and thrive long-term. Key elements of durability include relationship building, co-creation, an ownership mindset, flexible leadership, and a constant state of learning. The author urges philanthropy to shift its focus from simply ensuring programs survive to empowering organizations and communities to build lasting, self-sustaining systems. By fostering local ownership, investing in future leadership, and diversifying funding sources, philanthropy can support durable, resilient nonprofits that continue to make a meaningful impact. Read this article to learn how to build a stronger, more durable nonprofit sector.