ILLEGAL USE OF NARCOTIC DRUGS, PSYCHOTROPIC SUBSTANCES, AND THEIR ANALOGUES CAUSES HEALTH DAMAGE, THEIR ILLEGAL TRAFFICKING IS PROHIBITED AND ENTAILS LIABILITY ESTABLISHED BY LAW. One hundred thousand years ago, Homo sapiens was one of at least six human species living on this planet—an unremarkable animal playing a role in the ecosystem no greater than that of gorillas, fireflies, or jellyfish. But about seventy thousand years ago, a mysterious change in Homo sapiens' cognitive abilities turned it into the ruler of the planet and a nightmare for the ecosystem. How did Homo sapiens conquer the world? What happened to other human species? When and why did money, states, and religion appear? How did empires arise and collapse? Why did almost all societies place women below men? How did science and capitalism become dominant doctrines of the modern era? Have people become happier over time? What kind of future awaits us?