From the article:
> [The idea that all lives are of equal worth] is a radical idea, one ultimately inscribed in our nation’s founding documents: we are all created equal and should be respected as such. I do not think it a mere coincidence that among the fifty-six founding fathers who signed the declaration of our independence was a physician, Dr. Benjamin Rush. He was a committed revolutionary and abolitionist precisely because of his belief in the principle.
Erm, no. It was not really some idealistic principle that motivated his views. From wikipedia:
> Benjamin Rush (1745–1813), a Founding Father of the United States and a physician, proposed that being black was a hereditary skin disease, which he called "negroidism", and that it could be cured. Rush believed non-whites were really white underneath but they were stricken with a non-contagious form of leprosy which darkened their skin color. Rush drew the conclusion that "whites should not tyrannize over [blacks], for their disease should entitle them to a double portion of humanity. However, by the same token, whites should not intermarry with them, for this would tend to infect posterity with the 'disorder'... attempts must be made to cure the disease".