"The inner primate persisted stubbornly and irrepressibly within the genealogy of our substance, with the difference between man and higher animals being one of 'degree and not of kind.' It was only 'natural prejudice' and 'arrogance' that had previously led us, in the face of incontrovertible evidence, 'to demur from this conclusion.' 'Nor should we,' Darwin stated, 'be ashamed of it.' Indeed, through 'having thus risen, instead of being aboriginally placed there,' humans could hope to elevate themselves even further." Adrian Woolfson