For his ideals of humanitarian service, his vision to promote the construction of a more just, tolerant and inclusive society, William Soto received a proclamation in recognition of this trajectory as an activist for peace, granted by the Albuquerque Town Hall, the biggest city in the North American state of New Mexico.

With the fruit of a Declaration for the strengthening and defense of the Rights of Indigenous Peoples, the 4th International Encounter of the Children Mother Earth was held in Albuquerque, New Mexico, U.S.A. on December 6, 2016, with the presence of leaders from the main indigenous nations of United States, Central America, the Caribbean and Easter Island.