In the wake of the recognition of the Whanganui River in New Zealand, the Ganges and Yamuna Rivers in India, the Yarra River in Australia and the Atrato River in Colombia as «subjects of rights», the International Observatory on Nature’s Rights has initiated a reflection on the possibility of recognizing the St. Lawrence River, the «path that walks» as it is called by the First Nations, as a «legal person». The texts in this collective work deal with the implications of attributing a legal personhood and rights to the St. Lawrence River, delve into the epistemological foundations of the paradigm of the recognition of the rights of Nature and present concrete cases of recognition of rivers as subjects of law. Written by experts from several countries where the recognition of the legal personhood of rivers has occurred to date, they take an in-depth look at the challenges and contributions of this paradigm shift in river protection. This book answers questions about the implications of such recognition and contributes to the process of building a new law that has just begun in Quebec and Canada with the adoption in February 2021 of resolutions conferring the status of «legal person» on the MagPie/ Muteshekau Shipu River located on the North Shore of Quebec and on the Nitassinan (ancestral territory) of two Innu communities, Ekuanitshit and Uashat mak Mani-utemam. Contributions : Inès Bennada, David Cordero Heredia, Teresa Vicente Giménez, Stratégies Saint-Laurent, Isabelle Delainey, Uapukun Mestokosho, Sylvain Gaudreault, Andrew Galliano, Nathalia Parra, Bianca De Marchi Moyano, Hugo Muñoz, Danaé Espinoza, Erin O’Donnell, Brettel Dawson, Shrishtee Bajpai, Rébecca Pétrin, Sokhna Sene, Victor David, Daniel Turp and Yenny Vega Cárdenas.