Decision 31 G.R. No. 224469 to the mainstream. This eagerness inevitably tended to measures that eroded indigenous peoples' identities. Spanish and American colonial rule was characterized by the "need to impart civilization[.]" In People v. Cayat: As early as 1551, the Spanish Government had assumed an unvarying solicitous attitude towards these inhabitants, and in the different laws of the Indies, their concentration in so-called "reducciones" (communities) had been persistently attempted with the end in view of according them the "spiritual and temporal benefits" of civilized life. Throughout the Spanish regime, it had been regarded by the Spanish Government as a sacred•"duty to conscience and humanity" to civilize these less fortunate people living "in the obscurity of ignorance" and to accord them the "moral and material advantages" of community life and the "protection and vigilance afforded them by the same laws." (Decree of the Governor-General of the Philippines, Jan. 14, 1887.) This policy had not been deflected from during the American period. President McKinley in his instructions to the Philippine Commission of April 7, 1900, said: In dealing with the uncivilized tribes of the Islands, the Commission should adopt the same course followed by Congress in permitting the tribes of our North American Indians to maintain their tribal organization and government, and under which many of those tribes are now living in peace and contentment, surrounded by civilization to which they are unable or unwilling to conform. Such tribal government should, however, be subjected to wise and firm regulation; and, without undue or petty interference, constant and active effort should be exercised to prevent barbarous practices and introduce civilized customs. The 1935 Constitution was silent on indigenous peoples. However, it was under the 1935 Constitution that Republic Act No. 1888, creating the ' Commission on National Integration, was passed. Its title and declaration of policy reveal a predisposed view of "Non-Christian Filipinos" or "National Cultural Minorities" as uncultivated, and whose advancement depended on the extent to which they were integrated to the mainstream: ~ REPUBLIC ACT No. 1888 AN ACT TO EFFECTUATE IN A MORE RAPID AND COMPLETE MANNER THE ECONOMIC, SOCIAL, MORAL AND POLITICAL AND ADVANCEMENT OF THE NON-CHRISTIAN FILIPINOS OR NATIONAL CULTURAL MINORITIES AND TO RENDER REAL, COMPLETE AND PERMANENT THE INTEGRATION OF ALL SAID NATIONAL CULTURAL MINORITIES INTO THE BODY POLITIC, CREATING THE COMMISSION ON NATIONAL INTEGRATION CHARGED WITH SAID FUNCTIONS SECTION 1. It is hereby declared to be the policy of Congress to foster, accelerate and accomplish by all adequate means and in a systematic, rapid and complete manner the moral, material, economic, social and political advancement of the Non-Christian Filipinos, hereinafter called National Cultural Minorities, and to render real, complete and permanent the integration of all the said National Cultural Minorities into the body politic.