Throughout history migration has enriched societies by mixing ideas, technologies and cultures. Migrants are only 3% of the world population but they generate more than 9% of global GDP. In the developed countries migrants contribute to an even greater extent to growth and welfare – a contribution which is rarely recognised.

Making diverse societies work is not simple. There are real challenges in building trust between people of different cultures and religions, particularly in times of crisis. But political leadership and inclusive discourse can help overcome mistrust and fears. Identity matters but we should avoid the traps of identity politics.

The question we need to address – on the International Migrants day as well as every other day - is not whether to accept migration or not but how to manage it so that its advantages are greater than its costs. The answer is complex but it can be a positive one if we apply two main principles: full respect for human rights and democratic values; and policies of inclusion which enable everyone to realise their potential.

As the leader of Europe’s chief Human Rights organisation I must underline that human rights norms apply to nationals and foreign residents alike, regardless from their legal status. Council of Europe member States cannot derogate to their human rights obligations! They cannot afford to ignore discrimination & prejudice as they fuel resentment and conflict which threaten democratic security.

Today I wish to pay tribute to all those who have made it their mission to make sure that migrants and refugees feel safe and at home in their new countries. The Mayors, practitioners and citizens from the 105 cities of the Intercultural cities network who work relentlessly, day by day to bridge cultures, break ghettoes, counter negative myths and make equal opportunities for all a reality. Research shows that Intercultural cities are more livable and prosperous than the average. I am proud that the Intercultural cities movement is rapidly growing and call on Mayors across Europe and beyond to join us and help build an open and inclusive Europe and realise the diversity advantage.

Inclusion is not about charity, it is about legating to our children peaceful, safe and cohesive societies. Sharing our cities is investing in the future.

See the Secretary General's message