What is the central thesis of this text?

Synthesized answer

The provided passages do not contain enough information to answer the question about the central thesis of "On Protracted War" by Zedong Mao. The passages only include the title, author, category, and page count of the text [1]. There is no content from the book itself that outlines its central thesis.

Synthesized from the book passages below. Chat with the book on Feynman for follow-up.