37. We note with appreciation that despite the racism, racial discrimination, xenophobia and related intolerance faced by them for centuries, people of Asian descent have contributed and continue to contribute significantly to the economic, social, political, scientific and cultural life of the countries where they live; 38. We call upon all States to review and, where necessary, revise any immigration policies which are inconsistent with international human rights instruments, with a view to eliminating all discriminatory policies and practices against migrants, including Asians and people of Asian descent; 39. We recognize that the indigenous peoples have been victims of discrimination for centuries and affirm that they are free and equal in dignity and rights and should not suffer any discrimination, particularly on the basis of their indigenous origin and identity, and we stress the continuing need for action to overcome the persistent racism, racial discrimination, xenophobia and related intolerance that affect them; 40. We recognize the value and diversity of the cultures and the heritage of indigenous peoples, whose singular contribution to the development and cultural pluralism of society and full participation in all aspects of society, in particular on issues that are of concern to them, are fundamental for political and social stability, and for the development of the States in which they live; 41. We reiterate our conviction that the full realization by indigenous peoples of their human rights and fundamental freedoms is indispensable for eliminating racism, racial discrimination, xenophobia and related intolerance. We 23