Trim and Polish 

On reflection, the 19th Century section actually is a bit bloated with non-relevant stuff. The issue of slavery being based on assumed inferiority is obviously core to the controversy, but there is also a lot of waffle including arbitrary observations and one guy who merely quoted Herodotus in his dictionary. This section is basically the longest in the article, and it thus gives undue weight to stuff that is not really core. I propose to thin this section down to focus on the controverial issue around slavery. Any objections?