And three generations is not long. That's the point I tried to make. It takes more then 3 to 5 times that. As I noted, they gained freedom with no family history of freedom, nor education, nor of work leading to success. Today you can still find families where they don't read. Think about that. If your parents didn't read, and your grand parents didn't read, and your great grand parents didn't read, what is the likelihood you would read? Apply that to other good habit.
In my day, they sad walk a mile in someone else's shoes before you criticize. I still think that's a good idea.