The Tellus Institute is an American non-profit organization established in 1976 with the aim of bringing scientific rigor and systemic vision to critical environmental and social issues.

[2] These projects sought to develop an integrated perspective on issues such as energy, water, sustainable communities, corporate responsibility, and climate change.

The Institute applied these tools in scores of countries over a 25-year period, before assigning further development and application to SEI-US.

[3] Building on this legacy, the institute has reframed its mission, focusing on research, scholarship, and network-building for advancing a just and sustainable planetary civilization.

This “Great Transition” would entail a fundamental shift in human values and the ways we produce, consume, and live.