People Evicted from Property by Owners -
Results of the "Monster."
The Joads, in The Grapes of Wrath, were ran off their land when their property was "tractored" by the bank. Otherwise known as the monster.
"That's right," the tenant said. "But for your three dollars a day fifteen or twenty families can't eat at all. Nearly a hundred people have to go out and wander on the roads for your three dollars a day. Is that right?" - The Grapes of Wrath
Families were losing homes that they had for generations, although, it was not much, it was enough to keep them alive and safe. When they lost their homes, they lost their security as well as their wellbeing.
"We're sorry. It's not us. It's the monster. The bank isn't like a man.
Yes, but the bank is only made of men.
No, you're wrong there -- quiet wrong there. The bank is something else than men. It happens that every man in the bank hates what the bank does, and yet the bank does it. The bank is something more than men, I tell you. It's the monster. Men made it, but they can't control it." - The Grapes of Wrath
After the families, lost their farms they began to travel and live on the road. On the road, families stayed in Hoovervilles while the search for work continued.