Ernst Heinrich Haeckel (1834-1919) was renowned as one of the foremost early exponents of Darwinism. His work was credited with having caused the acceptance of Darwinism in Europe, and his popular studies ― preaching the continuity of all life, organic and inorganic, from prehistoric time to the present ― converted tens of thousands of readers all over the world. Today, although no one is greatly interested in Haeckel the biologist-philosopher,...