{'fraction_non_alphanumeric': 0.047619047619047616, 'fraction_numerical': 0.02619047619047619, 'mean_word_length': 5.046762589928058, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Workers on the theory of Evolution since Darwin

Students of science who are not biologists must often be confused by the constant discussions of evolution which now distract attention rather than define truth, and they will, therefore, be duly grateful to Prof. L. W. MacBride, F.R.S., for his very capable summary of present knowledge and theory, under the heading given above (Nature, January 10 and 19, 1925, pages 52 and 89). Incidentally, we note with some surprise, in view of the large number of biologists who have lived since the Origin of Species was published in 1859, how very few of them are mentioned in this outline – only Darwin, Spencer, Lamarck, Huxley, Meckel, Haeckel, Weismann, Romanes, Goldschmidt, Mendel, Correns, Johannsen, Bateson, Morgan, Jennings, Agar, De Vries, Willis, Einer, Cope, Driesch, Hertwig, Kammerer, Durkhen, Harrison, McDougall, Tornier, and Jansen: that is twenty-eight names altogether. Doubtless more names would be entered in a fuller treatment of the subject; but in any case the paucity of effective workers on evolution compared with the vast totals of the entire human population over the same period supports my thesis of the great rarity of really fruitful work in science (Science Progress, October 1924 and January 1925). Studies of the figures regarding almost any of the main branches of scientific progress–such as the Calculus, Gravitation, Relativity, Parasitology –will yield similar results. Obviously, effective advances are almost always made only by men who happen to be specially endowed by nature for the work, and must, therefore, be usually very rare. Science Progress (2009), 92(3/4), 306 [1924 – 25, XIX, 664]