Jan Horský is a longstanding senior researcher and lecturer at the Department of Historical Sociology at the Charles University Prague. He graduated in history and also holds higher degrees in social and cultural anthropology. He has long been involved in research into the noetics of historical science and the philosophy of history. He has performed several studies in the field of cultural history, especially on the early modern religious history of Europe and has worked extensively on historical demography, historical anthropology and family history. Furthermore he has discussed various issues of possible research links between historical demography and cultural history (e.g. related to the so-called grandmother hypothesis). Anton Markoš graduated from the Charles University Faculty of Science with a degree in Cell Biology. Emeritus; in his active days he teached in Cell and Theoretical biology. He has published many books, book chapters and articles in the field.