Originfire

One lifetime. Instead of hundreds of thousands of years of human progress. One man is sent 300,000 years into the past to rewrite the entire course of human civilization. He is sent by an alien race to prepare humanity for a future war against another. Not by fighting. But by starting humanity’s rise hundreds of thousands of years earlier than it ever began. If he fails, it will not just be humanity that is lost. Everything alive on Earth will be wiped out. This is the first book in a larger series. Reddit Rank Verification