Europe's solutions to migration create humanitarian crises

One of Europe's main solutions to migration — Greece's overcrowded, unsanitary Moria migrant camp — has suicidal children and conditions that a psychiatrist compared to "an old-fashioned mental asylum."

In another heavily criticized solution to immigration, imprisoned men and women have been shuttled away from one gunbattle only to end up incarcerated on the front line of another, vulnerable to both trafficking and new abuse.

The jammed Moria camp on the Greek island of Lesbos and the dangerous migrant detention centers in Libya serve as a sober reminder to European leaders that their statistical success in curbing migration into the continent has spawned what the UN and others condemn as massive humanitarian failures.

Deeply divided over how and where to control Europe's borders, leaders are meeting Wednesday in a summit in Austria.

Migrant sea...