What a ponderous, pretentious load. This strikes me very much as a list of "Books I want everyone to know that I think everyone should read" which is very different from the stated title. Is Origin Of Species really a better choice than almost anything on the topic by Dawkins or Gould for the general purpose of "[learning] of our kinship with all other life on Earth"?
I think the historical context also has value just because I think, in our modern age, there's a tendency to dismiss the intellectual achievements of our forebearers. To think that humanity in the past made mistakes just because they were dumb. Which is dangerous, because these mistakes tend to repeat themselves. I think reading these older books can give you an appreciation for not just what's changed with humanity, but what's stayed the same too and I think that can be very valuable indeed.
So ponderous maybe, but I don't think it's a pretentious list. I think there's real value there.