What evidence exists to support the assertion that Jefferson was a racist?

Jefferson had written it in the fall of 1781 and had agreed to a French edition only after learning that an unauthorized version was already in press. Notes contained an extensive discussion of slavery, including a graphic description of its horrific effects on both blacks and whites, a strong assertion that it violated the principles on which the American Revolution was based, and an apocalyptic prediction that failure to end slavery would lead to “convulsions which will probably never end but in the extermination of one or the other race.” It also contained the most explicit assessment that Jefferson ever wrote of what he believed were the biological differences between blacks and whites, an assessment that exposed the deep-rooted racism that he, like most Americans and almost all Virginians of his day, harboured throughout his life.

Explanation: