New York City is in the throes of a humanitarian emergency, a term defined by the Humanitarian Coalition of large international aid organizations as “an event or series of events that represents a critical threat to the health, safety, security or wellbeing of a community or other large group of people.” New York’s is what aid groups would characterize as a “complex emergency”: man-made and shaped by a combination of forces that have led to a large-scale “displacement of populations” from their homes. What makes the crisis especially startling is that New York has the most progressive housing laws in the country and a mayor who has made tenants’ rights and affordable housing a central focus of his administration.