With the number of homeless families entering New York City shelters at an all time high, Thomas Main, professor at The School of Public and International Affairs at Baruch College (CUNY) and the author of Homelessness in New York City: Policymaking from Koch to de Blasio (NYU Press, 2016) 1479896470, tells the story of NYC's mayors' struggles to deal with homelessness, from 1979, when the courts determined people had a right to shelter, through today.