Do you have any evidence of the fabled American social mobility? The faith in it is high, but recent things I've read seems to indicate that it's more of a drea

Do you have any evidence of the fabled American social mobility? The faith in it is high, but recent things I've read seems to indicate that it's more of a dream than reality. But it's all too disorganized for me to find any sources off the top of my head. All it takes for people like Europeans to move to a place like America is to believe in the dream. It doesn't really have to be real.