The US does not have the same class structure as most developed nations. We have 40 million black Americans who are descended from slaves and faced legal discrimination up until the mid-1960s. This population makes up a disproportionate share of our prison population. Since then, a second extremely large ethnic underclass had immigrated across the US’s southern border. This population also makes up a disproportionate share of our prison population. As far as I am aware, this is unique among developed western nations.