Book excerpt: Even leading capitalists admit that capitalism is broken. Green Swans is a manifesto for system change designed to serve people, planet, and prosperity. In his twentieth book, John Elkington—dubbed the “Godfather of Sustainability”—explores new forms of capitalism fit for the twenty-first century. If Nassim Nicholas Taleb’s “Black Swans” are problems that can take us exponentially toward breakdown, then “Green Swans” are solutions that take us exponentially toward breakthrough. The success—and survival—of humanity now depends on how we rein in the first and accelerate the second. Green Swans draws on Elkington’s firsthand experience in some of the world’s best-known boardrooms and C-suites. Using case studies, real-world examples, and profiles on emergent technologies, Elkington shows how the weirdest “Ugly Ducklings” of today’s world may turn into tomorrow’s world-saving Green Swans. This book is a must-read for business leaders in corporations great and small who want to help their businesses survive the coming shift in global priorities over the next decade and expand their horizons from responsibility, through resilience, and onto regeneration.