The main idea of this book is shocking. All life on the planet, including people, live in symbiosis with viruses, evolve with them and thanks to them... survive. The reader's first reaction: this can't be! But it turns out it can... Viruses, their derivatives and closely related structures make up at least forty-three percent of the human genome, which leads to the conclusion: natural selection in humans and their ancestors occurred in partnership with hundreds of viruses. But how did viruses integrate into the human genome? How does natural selection work at the virus-host level? How do the driving forces of evolution—mutation, symbiogenesis, hybridization, and epigenetics—interact? This is a logical, scientifically substantiated story supported by experimental data by Frank Ryan. The book was produced in accordance with Federal Law of December 29, 2010 No. 436-FZ, Art. 1, paragraph 2, paragraphs. 3. There are no age restrictions