The progress in science has been anything but uniform in time and place. ...In the course of time the centres of scientific activity have been contin… - John Desmond Bernal

If Engels had not been the constant companion in arms of Marx in the revolutionary struggles of the 19th century, there is no doubt that he would be remembered chiefly as one of the foremost scientist-philosophers of the century. It was an ironical tribute paid to the correctness of his views as to the relations between politics and ideology that he suffered complete neglect from the scientists of the Victorian age. But time now has taken its revenge, and Engels’ contemporary views on 19th century science seem to us now in the 20th far more fresh and filled with understanding than those of the professional philosophers of science of his day, who for the most part are completely forgotten, while the few that linger on, such as Lange and Herbert Spencer, are only quoted as examples of the limitations of their times.

Science, in one aspect, is ordered technique; in another, it is rationalized mythology. Because it started as a hardly distinguishable aspect of the mystery of the craftsman and the lore of the priest... science was long in establishing any independent existence in society. Even when it did find its own... adepts in medicine, astrology, and alchemy, these formed, for many ages a small group parasitic on wealthy princes, clerics, and merchants. It is only in the last three centuries that science has become traditionally established as a profession in its own right, with its specific education, literature, and fellowship.

The theme which constantly recurs is the complex interaction between techniques, science, and philosophy. Science stands as a middle term between the established and transmitted practice of men who work for a living, and the pattern of ideas and traditions which assure the continuity of society and the rights and privileges of the classes that make it up.