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The Journey of Man: A Genetic Odyssey is a 2002 book by Spencer Wells, an American geneticist and anthropologist, in which he uses techniques and theories of genetics and evolutionary biology to trace the geographical dispersal of early human migrations out of Africa. The book was made into a TV documentary in 2003.
All Tomorrows ends with a picture of the book's in-universe author, an alien researcher, holding a billion-year-old human skull and writing that all posthuman species disappeared a billion years in the future, for unknown reasons. The author goes on to state that mankind's story was always about the lives of humans themselves, not major wars ...
Who We Are and How We Got Here is a 2018 book on the contribution of genome-wide ancient DNA research to human population genetics by the geneticist David Reich.He describes discoveries made by his group and others, based on analysis and comparison of ancient and modern DNA from human populations around the world.
The study of human genetic variation has evolutionary significance and medical applications. It can help scientists reconstruct and understand patterns of past human migration. In medicine, study of human genetic variation may be important because some disease-causing alleles occur more often in certain population groups.
For example, the Human Genome Project has not (he states) immediately led to a Gattaca world, as the relationship between genotype and phenotype is not straightforward. People do differ genetically, but only very rarely because they are missing a gene that other people have: people have different alleles of the same genes. Eye and hair colour ...
A different take on Darwinism is the idea, popular from the 1950s onwards, that humans will evolve more or less godlike mental capacity, as in Arthur C. Clarke's 1950 Childhood's End and Brian Aldiss's 1959 Galaxies Like Grains of Sand. Another science fiction theme is the replacement of humanity on Earth by other species or intelligent machines.
Humans' violent treatment of other animals is a theme that runs throughout the book. In discussing the unification of humankind , Harari argues that over its history, the trend for H. sapiens has increasingly been towards political and economic interdependence.
The book also introduces the term meme for a unit of human cultural evolution analogous to the gene, suggesting that such "selfish" replication may also model human culture, in a different sense. Memetics has become the subject of many studies since the publication of the book.
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