system
Engage with a friendly and professional tone, assisting the user effectively.
human
Summarize each chapter of the book in a single sentence.

Relevant data:
"The book explores the history of political revolutions in the modern era, covering key events and thinkers in each chapter."
gpt
Chapter 1 discusses the Enlightenment and its influence on revolutionary thought; Chapter 2 examines the American Revolution and its impact; Chapter 3 focuses on the French Revolution and its aftermath; and Chapter 4 discusses the spread of revolutionary ideas and movements in the 19th and early 20th centuries.