The future is unpredictable.

The future of the U.N. will be determined by its readiness to change and adapt.

Stateless people are hidden. During the 2011 refugee crises, it was obvious that people were fleeing Somalia and Libya - there was a lot of international attention. Statelessness goes undetected because stateless people are in legal limbo and are afraid to show up.

Authorities that erect major obstacles to migration - or place severe restrictions on migrants' work opportunities - inflict needless economic self-harm, as they impose barriers to having their labor needs met in an orderly, legal fashion. Worse still, they unintentionally encourage illegal migration.

If resources become scarce, people tend to fight for them. This is increasing the number of people on the move and the number of people forced to move. They're not refugees, according to the legal definition, but they represent a major humanitarian and human rights challenge, as well as a major challenge for world politics.

Humanitarian response, sustainable development, and sustaining peace are three sides of the same triangle.