The award-winning book Wild New World, by Dan Flores, offers a new take on the ongoing human-caused Sixth Mass Extinction.
Flores argues that this Mass Extinction began not in our modern age with industrialization, or even at the beginning of agriculture, but instead at least 13,000 years ago, before people crossed the land bridge into North America. The megafauna on our continent, including mammoths, mastodons, steppe lions, giant ground sloths, and many, many more species, were no match for this new, clever, armed apex predator.
Flores paints a vivid picture of American fauna and its decline from the Pleistocene until now, with a bit of hope at the end. For more, read Wild New World: The Epic Story of Animals and People in America.