The Will to Believe, and Other Essays in Popular Philosophy

Solidarity of causes in the world, 216. The human mind abstracts in order to explain, 219. Different cycles of operation in Nature, 220. Darwin's distinction between causes that produce and causes that preserve a variation, 221. Physiological causes produce, the environment only adopts or preserves, great men, 225. When adopted they become social ferments, 226. Messrs. Spencer and Allen criticised, 232. Messrs. Wallace and Gryzanowski quoted, 239. The laws of history, 244. Mental evolution, 245. Analogy between original ideas and Darwin's accidental variations, 247. Criticism of Spencer's views, 251.