The document discusses the limits of human knowledge and ability in the face of complex global challenges. It argues that while scientific and technological progress has enabled growth, it has also caused environmental damage and issues that transcend individual interests. To address problems like climate change, new approaches are needed that integrate knowledge across disciplines and find ways to cooperate rather than compete. Current limits include those of individuals, sociobiology, socioeconomics, technology, and philosophy. New kinds of thinking are required to develop knowledge sensitive to these boundary conditions and foster planetary stewardship.