Unhealthy working conditions are working long hours , coming in a early time because you don’t get the proper rest same thing for coming in at night .
Basically, all of European and Asian economy was more or less ruined after the War while the United States were safe because their land was not destroyed. This was combined with the baby boom generation when suddenly a lot of young people began working and since the US was exporting like never before they needed factories and workplaces filled.