Theory of web of causation was given by
Mc Mohan and Pugh
Petfenkoffer
John snow
Louis Pasteur
Theory of web of causation was proposed by MacMahon and Pugh in their book: "Epidemiological Principles and Methods". Web of causation considers all the predisposing factors of any type and their complex inter-relationship with each other. Ref : Park&;s Textbook of Preventive and Social Medicine; 23rd edition; Page 34
Concept of health and disease