In 2009, under the leadership of the Bolivian State, intergovernmental negotiations were initiated on the principles of harmony with nature. It all started with the declaration of the International Mother Earth Day on April 22, 2009 by the General Assembly.
To find the declarations of the General Assembly since 2009, it is here.
For the historical chronology of their adoption, it is here.
A/RES/75/220 ; A/75/266 ; A/RES/74/224 ; A/74/236 ; A/RES/73/235 ; A/73/221 ; A/RES/72/223 ; A/72/175 ; A/RES/71/232 ; A/71/266 ; A/RES/70/208 (. . .)