Capra’s 1996 book **The Web of Life** is often referenced as his most influential work for the Rights of Nature movement. In it, he presents a scientific synthesis of systems theory, ecology, and complexity science, arguing that life is fundamentally relational and cannot be reduced to isolated parts - harpercollins.com 
The book does not propose legal rights explicitly, but it provides a scientific and philosophical basis for treating ecosystems as living wholes rather than exploitable resources. This framing aligns closely with later legal arguments for ecosystem personhood.