 René and Paul Danger (1930 and 1965) 
This article explores knowledge transmission between two urban planners: René Danger and his son, Paul, both members of the Société des plans régulateurs de villes (Society of Urban Regulatory Plans). Founded by René, the society is known for its vitality in creating plans. René Danger’s tendency to theorize his practice can also be seen in his son, Paul. Both were involved in the writing of urban planning textbooks, which will be the focus of this article. The objective will be to show how René and Paul adopted similar approaches. We will identify the principles shared by the two urban planners through the analysis of these texts and their narratives. When put in perspective, but not compared, would they both show similar approaches in the practice of urban planning? If so, what would be the key elements or principles of these approaches which, it should be noted, are still considered relevant?