The early European explorers went gaga over the abundance of the Americas. Primeval forests covered the land, deer and elk were plentiful, and herds of bison thundered across the plains, they reported back to Spain, Portugal and England.
Fish filled the rivers, and mussels and clams grew big and juicy along the shores. From South America came tales of unimaginable riches buried in secret gold mines in pristine jungle. And save for a few powerful but isolated societies, such as the Inca in Peru and the Maya in Mexico, and nomadic bands of primitives up north, almost no one lived in this fantastic paradise. These lush lands -- a gift from God! -- were wild and free.
That's the textbook version of the New World at the time of Columbus, the one you probably learned in school. But in a provocative new book, "1491," science writer Charles C. Mann proposes a revision.
full article at Sfgate