Our lives have no meaning, our feelings are just evolutionary spandrels, we have no free will. We can be manipulated in almost any way when the right inputs are applied to the carbon neurons in our brains. We happen to have evolved to having self-consciousness and the ability to create technologies, but despite millennia of evolution, we remain hackable animals. He also insists that we are simply lucky clumps of carbon. Whether about money, religion, liberalism, monarchy, or anything else, the stories serve as the organizing principles that provide a competitive advantage over other species and the natural environment. All cats, for example, from the smallest house kitten to the most ferocious lion, share a common feline ancestor who lived about 25 million years ago.Harari’s first great and supposedly novel insight is that the advances of homo sapiens and all of civilization are based on stories of equal fictitiousness. All members of a family trace their lineage back to a founding matriarch or patriarch. Genera in their turn are grouped into families, such as the cats (lions, cheetahs, house cats), the dogs (wolves, foxes, jackals) and the elephants (elephants, mammoths, mastodons). Presumably, everyone reading this book is a Homo sapiens the species sapiens (wise) of the genus Homo (man). Lions, for example, are called Panthera leo, the species leo of the genus Panthera. Biologists label organisms with a two-part Latin name, genus followed by species. Lions, tigers, leopards and jaguars are different species within the genus Panthera. Species that evolved from a common ancestor are bunched together under the heading 'genus' (plural genera). They will happily mate and their puppies will grow up to pair off with other dogs and produce more puppies. By contrast, a bulldog and a spaniel may look very different, but they are members of the same species, sharing the same DNA pool. The two types of animals are consequently considered two distinct species, moving along separate evolutionary paths. Mutations in donkey DNA can therefore never cross over to horses, or vice versa. They will mate if induced to do so but their offspring, called mules, are sterile. But they show little sexual interest in one another. Horses and donkeys have a recent common ancestor and share many physical traits. Animals are said to belong to the same species if they tend to mate with each other, giving birth to fertile offspring. The most important thing to know about prehistoric humans is that they were insignificant animals with no more impact on their environment than gorillas, fireflies or jellyfish.īiologists classify organisms into species.
Nobody, least of all humans themselves, had any inkling that their descendants would one day walk on the moon, split the atom, fathom the genetic code and write history books. These archaic humans loved, played, formed close friendships and competed for status and power but so did chimpanzees, baboons and elephants. On a hike in East Africa 2 million years ago, you might well have encountered a familiar cast of human characters: anxious mothers cuddling their babies and clutches of carefree children playing in the mud temperamental youths chafing against the dictates of society and weary elders who just wanted to be left in peace chestthumping machos trying to impress the local beauty and wise old matriarchs who had already seen it all. But for countless generations they did not stand out from the myriad other organisms with which they shared their habitats. Animals much like modern humans first appeared about 2.5 million years ago. There were humans long before there was history. This book tells the story of how these three revolutions have affected humans and their fellow organisms. The Scientific Revolution, which got under way only 500 years ago, may well end history and start something completely different. The Agricultural Revolution sped it up about 12,000 years ago. Three important revolutions shaped the course of history: the Cognitive Revolution kick-started history about 70,000 years ago. The subsequent development of these human cultures is called history. About 70,000 years ago, organisms belonging to the species Homo sapiens started to form even more elaborate structures called cultures. The story of organisms is called biology. The story of atoms, molecules and their interactions is called chemistry.Ībout 3.8 billion years ago, on a planet called Earth, certain molecules combined to form particularly large and intricate structures called organisms. The story of these fundamental features of our universe is called physics.Ībout 300,000 years after their appearance, matter and energy started to coalesce into complex structures, called atoms, which then combined into molecules. 5 BILLION YEARS AGO, MATTER, energy, time and space came into being in what is known as the Big Bang.