The document discusses sustainable development as the ultimate leadership challenge. It outlines 5 steps for leaders to implement sustainable development in their organizations: 1) describe a need for change and commit to learning, 2) inspire a shared vision, 3) engage stakeholders, 4) execute the strategy, and 5) evaluate results and share lessons learned. The document emphasizes the importance of considering people, planet, and profit - the triple bottom line - through a systems thinking perspective to achieve long-term sustainability.