This book is the first to chronicle the story of Housing First (HF), a paradigm-shifting evidence-based approach to ending homelessness that began in New York City in 1992 and rapidly spread to other cities nationally and internationally. The authors report on the rise of a 'homeless industry' of shelters and transitional housing programs that the HF approach directly challenged by rejecting the usual demands of treatment, sobriety and housing readiness. Based upon principles of consumer choice, harm reduction and immediate access to permanent independent housing in the community, HF was initially greeted with skepticism and resistance from the 'industry'. However, rigorous experiments testing HF against 'usual care' produced consistent findings that the approach produced greater housing stability, lower use of drugs, and alcohol and cost savings. This evidence base, in conjunction with media accounts of HF's success, led to widespread adoption in the U.S., Canada, Western Europe, and