Bolshevism as a social phenomenon is to be reckoned as a religion, not as an ordinary political movement. The important and effective mental attitudes to the world may be broadly divided into the religious and the scientific. The scientific attitude is tentative and piecemeal, believing what it finds evidence for, and no more. Since Galileo, the scientific attitude has proved itself increasingly capable of ascertaining important facts and laws, which are acknowledged by all competent people regardless of temperament or self-interest or political pressure. Almost all the progress in the world from the earliest times is attributable to science and the scientific temper; almost all the major ills are attributable to religion