Child labor was very big during the late 1800s through the early 1900s. At times children were more useful laborer because their size allowed them to fit into tight spaces throughout the factories or mines. Many factory owners would hire children opposed to adults because they accepted lower wages as pay.
The impact of pseudoscientific ideas of race resulted in unethical immense human loss within the Jewish Nation by the Nazi Germany during the period of 1933-1946