Therefore, it is inevitably a product of historical development. Humans who have recently separated from the animal kingdom are in all fundamental ways not as free as animals themselves, but every step forward on the path of civilization is one step towards freedom. On the threshold of human history, there is the discovery of the transformation of motorized movement into heat; Softball hit like a girl crocs crocband clog. Using rubbing to get fire at the end of the development period from before until now, there was the discovery of the transformation of heat into motor: steam engine. – And despite the great liberating revolution that the steam engine did in the social world this revolution was only half-done.