Homelessness is a social crisis in the United States of America. According to McKinney–Vento Homeless Assistance Act, a person is considered homeless if he, she, or they “lack a fixed, regular, and adequate nighttime residence.” Homelessness emerged as a national issue in the 1870s.Many homeless people lived in emerging urban cities, such as New York City. Into the 20th Century, the Great Depression of the 1930s caused a devastating epidemic of poverty, hunger, and homelessness. There were two million homeless people migrating across the United States. In the 1970s, the de-institutionalization of patients from state psychiatric hospitals was a precipitating factor which seeded the homeless population. Unfortunately, today the homelessness situation in cities like New York is still oppressive.