"Among these widely differing families of men, the first that attracts attention, the superior in intelligence, in power, and in enjoyment, is the white, or European, the MAN pre-eminently so called, below him appear the Negro and the Indian... The most formidable of all the ills that threaten the future of the Union arises from the presence of a black population upon its territory; and in contemplating the cause of the present embarrassments, or the future dangers of the United States, the observer is invariably led to this as a primary fact... You may set the Negro free, but you cannot make him otherwise than an alien to the European. Nor is this all we scarcely acknowledge the common features of humanity in this stranger whom slavery has brought among us. His physiognomy is to our eyes hideous, his understanding weak, his tastes low; and we are almost inclined to look upon him as a being intermediate between man and the brutes."