Abstract
This chapter addresses prominent considerations both for and against the confessionalization thesis—the view that theological contents specific to the Catholic, Lutheran, and Reformed creeds had an influence on the theoretical contents of early modern natural philosophy. In this article, I present four case studies that indicate some senses in which the confessionalization thesis seems to be well-founded, as well as some senses in which existing criticisms seem to be persuasive. Some of the source materials point to the conclusion that one ought to be cautious about making too general claims concerning the pervasive role of confessionalization in early modern natural philosophy.