"major chapters" is correct and usable in written English.
You can use it to refer to the main sections of a book, essay, or other type of document. For example, "This paper is divided into four major chapters: Introduction, Data Analysis, Discussion, and Conclusion."
The book is divided into six major chapters and a final, smaller one, "Conclusions: Lesson and Cautions".
Mr. Clinton recently said he considered impeachment "one of the major chapters in my defeat of the revolution Mr. Gingrich led, that would have taken this country in a very different direction than it's going today".
"Robert Moses Astride New York" moves through major chapters of history in just a few stanzas, and the piece to be performed Saturday is only a sampling of what the composer, Gary Fagin, ultimately hopes will become a full-fledged production featuring additional characters like the neighborhood activist Jane Jacobs and Mayor Fiorello H. La Guardia.
But when you delete everything from that relationship, it's like leaving out major chapters in the history book of your life.
This history, during which we witness the recurrent influence of parameters related to climate, geography, landscapes, evolution, adaptation, resilience and also cultural adaptation and relationships between humans and nature, relates major chapters of human evolution: it is a good example of the indivisibility of natural and cultural aspects of the heritage.
There are major chapters on transforming growth factor- β, the interleukin-1 family, the interleukin-4/13 family, interleukin-6 and interleukin-10.
He's also a major chapter in the solution.
"This is a major chapter of American and world history," she said.
There is a major chapter on Britain's declining industrial position and encroaching labour unrest.
As the Tokyo quartet nears the end of a major chapter in its history, it shows no sign of weariness.
"While a major chapter in our endeavours closes today, OPCW's work in Syria will continue," Uzumcu said.
