Podrijetlo kršćanstva je knjiga marksističkog teoretičara Karla Kautskog iz 1908. U njemu pokušava objasniti podrijetlo kršćanstva i tvrdi da se ono najbolje može objasniti povijesnim materijalizmom, a ne crkvenim naukom.
Original title
Der Ursprung des Christentums. Eine historische Untersuchung
The book is a comprehensive publicistic work in the form of essays in which social, religious, political and media phenomena are read in the manner of theological hermeneutics, through the prism of a theological eye. It is composed of five chapters.