Further clarification requires far more nuance and assessment than is likely to be read. There's probably not even one single cause but a multitude of social i

Further clarification requires far more nuance and assessment than is likely to be read. There's probably not even one single cause but a multitude of social ills. Some people in this situation might experience one, but are probably each a unique snowflake of mixed problems. Unaffordable housing, mental illness (across a huge spectrum of many different illnesses, probably several different experts just for this), even the occasional grifter who just happens to prefer panhandling or urban scavenging to scrape by. My belief is that homelessness / 'unsheltered' is a catchall result of all the gaps in society's integration of individuals; and it's also a national level problem since the individuals can also be shipped around like those migrants that made the news recently. At least in America, but I've also heard that one of the emotionally motivating factors of Brexit were migrants from outside of the EU, we refuse to even provide a path and set of requirements for those who do want to participate in the system that's setup (instead in the US it's "build the wall" or "war at the border" extremes). Closing gaps in social safety nets and providing pathways for those who are troubled to integrate into society in mutually useful ways, or perhaps even caring for those who are incapable of such self care when provided help getting out of that hole, logically seems like a far harder challenge than any single city can face in a vacuum when we can't even handle easier issues on a national level.