"A few years ago I set out to canvass the literature on Charles Darwin. I thought it would be a manageable task, but I soon realized what a naïve idea this was. I do not know how many books have been written about him, but there seem to be thousands, and each year more appear. Why are there so many? Part of the answer is, of course, that he was a tremendously important figure in the history of human thought. But as I read the books - or, at least, as many of them as I could - it gradually dawned on me that all this attention is also due to Darwin’s personal qualities. He was an immensely likeable man, modest and humane, with a personality that continues to draw people to him even today.… Darwin’s strong feelings about slavery are expressed in many of his writings […]. His comments there are among the most moving in abolitionist literature. But it was his feelings about animals that impressed his contemporaries most vividly. Numerous anecdotes show him remonstrating with cab-drivers who whipped their horses too smartly, solicitously caring for his own animals and forbidding the discussion of vivisection in his home. At the height of his fame he wrote an article for a popular magazine condemning the infamous leg-hold trap in terms that would not seem out of place in an animal-rights magazine today."