  Sometimes new ideas come from unexpected directions and without any relation to science itself. This is how Fleck explains the discovery of spermatozoon which happened together with the fall of political absolutism and popularization of the idea of individual freedom understood mainly as freedom of personal movement. One could not discover spermatozoon just looking through a microscope. However someone, who thought about a free person, could notice freely moving—so “free”—spermatozoa (1939a). This was the influence of environment which created a restless mood necessary for searching for something new. And a new mode of thinking created in a different domain of life allowed one to perceive, distinguish, and describe it in a way which would stimulate reflections of others—those participating in revolutionary social changes as well.