Unlike the fading of inflexional morphology, which always occurs over the course of long periods, the emergence of fixed stress seems to happen during the life of a few generations. Perhaps because of this, there are hardly any publications or forum discussions about this phenomenon. In the last millennium, fixed stress emerged in Polish, Czech, Slovak, Sorbian and Macedonian, and in the latter case there is rather rich body of Church Slavonic manuscripts marking stress positions. Is there any idea how this change of stress placement practically happens? Do new generations of kids suddenly begin to put the stress on a certain syllable until they simply forget how to stress the words the old way? Or does the stress tend to move to its future fixed place paradigmatically, so that more and more words receive the stress on a certain syllable until some threshold gets crossed and this position becomes the default one?