Sociocultural evolution justify new policies such as eugenics. Most 19th-century and some 20th-century approaches aimed to provide models for the evolution of humankind as a single entity. However, most 20th-century approaches, such as multilineal evolution, focused on changes specific to individual societies. Moreover, they rejected directional change (i.e. orthogenetic, teleological or progressive change). Most archaeologists work within the framework of multilineal evolution. Other contemporary approaches to social change include neoevolutionism, sociobiology, dual inheritance theory, modernisation theory and postindustrial theory. In his seminal 1976 book "The Selfish Gene", Richard Dawkins wrote that "there are some examples of cultural evolution in birds and monkeys,
Vestiges of the Natural History of Creation amateurish deficiencies. The ideas in the book were favoured by Radicals, but its presentation remained popular with a much wider public. Prince Albert read it aloud to Queen Victoria in 1845. "Vestiges" caused a shift in popular opinion which – Charles Darwin believed – prepared the public mind for the scientific theories of evolution by natural selection which followed from the publication of "On the Origin of Species" in 1859. For decades there was speculation about its authorship. The 12th edition, published in 1884, revealed officially that the author was Robert Chambers, a Scottish journalist, who had written the book