It sounds like you're looking for a summary or an overview based on the textbook. Since I can’t browse a specific copyrighted PDF, I’ve drafted a concise essay that captures the core themes typically covered in their curriculum—focusing on the transition from the traditional world to the modern global era.
Santillana textbooks generally follow a chronological approach, focusing on the following major eras: The Modern World (18th–19th Century): historia universal pdf santillana
Studying Universal History through the lens of Santillana helps us understand that our current world—with all its technological wonders and social challenges—is the result of centuries of trial and error. It teaches us that while history is a record of power, it is also a record of the persistent human spirit seeking progress and understanding across borders. It sounds like you're looking for a summary