Why did the authors of the textbook devote many pages to the inhabitants of Central and South America and very few pages to the first inhabitants of the United States and Canada?
Our book is Duiker and Spielvogel's World History to the 1500s sixth edition. I do understand that the United States and Canada are relatively new but I need more.
The most likely explanation for this is the fact that there is a great deal more evidence that tells us about the peoples of Central and South America.
In the time before European contact, the biggest and most advanced civilizations were in Central and South America. Many of these civilizations left huge ruins that can be studied. Some of them had writing (pictographs) that tell archaeologists a great deal about their societies. Some of the civilizations still persisted when the Spanish arrived.
By contrast, North America produced no such civilizations. No North American civilizations had writing that we know of. No large civilizations (with big cities and such) existed when Europeans made contact. Therefore, there is much less known about the North Americans and they get less attention in history books.