Psychometricians today know full well that the relationship between race and income is almost entirely dependent on differences in intelligence between races, as confirmed by studies of large databases involving thousands of black and white individuals (e.g., Herrnstein and Murray, 1994, ch. 14; Kirkegaard, 2018). Since intelligence accounts for most of the income disparity between racial groups today, it would be naïve to think that these differences are due to some form of discrimination. But has this always been the case? According to the data I was able to find, it seems to have been so, at least since the late 19th century. Black people in the same place and in the same position earned the same amount most of the time. This was especially true for unskilled labor, such as factory work in the 1930s and primitive farming using old technology (the fact that the technology used in the South in the early 20th century was obsolete even at that time, see, for example, Ferleger, 1998, especially pp. 142, 156-157). As for higher-skilled occupations, such as teachers in the early 20th century and manufacturing workers in the mid-1960s, there was a wage gap of about 30%, but there is no reason to believe that this difference was due to anything other than a difference in productivity, and in fact this was certainly the case for manufacturing workers in 1966, since they were paid in exact proportion to their relative productivity. Finally, the only two studies that attempted to use advanced statistical techniques to prove the discrimination hypothesis ultimately either provided strong evidence of no difference or insufficient evidence for the alternative or null hypothesis.