Are Humans Still Evolving?

1556 WordsMay 7, 20137 Pages
Abstract evolution has occurred in humans for millions of years; however, in a modern society many scientists and evolutionists are now debating whether or not it is still occurring, and if it follows the same rules. With all of the new technology humans have created, some experts believe that humans have essentially conquered nature, and no further evolutionary changes will occur. Still, others hold opposing views; some experts believe that evolution is still occurring, but modern societal advancements have changed the rules. These experts say that the changes in evolution are a result of recent medical advancements that allow doctors to perpetuate genes that would not have lasted years ago. Additionally, others maintain that evolution is…show more content…
On the other hand, some scientists like to believe that evolution was halted between fifty thousand and a hundred thousand years ago, before the races diverged (Douglas, 2006). Geneticist Steve Jones theorizes that evolution has come to a halt as a result of societal changes on earth (McKie, 2005). He says that natural selection, mutation, and random change were the three things that drove evolution, and he believes that these factors are no longer present in the modern, western society. He further argues that the likelihood of mutations in genes is declining because of a generally younger age for fathers; he says fathers over the age of 35 are more likely to pass on mutations. This is because cell divisions in males increase with age, and increasing the number of cell divisions increases the chance for an error or a mutation (Belluz, 2008). Natural selection is also not as prevalent in modern society, years ago almost half the children died before twenty, whereas nowadays most people reach adulthood regardless of their genetics (Douglas, 2006). The final factor that Jones believed was responsible for the slowing down of evolution is the decreasing of random change in human genes. According to the rules of the animal kingdom, the human population should be ten thousand times smaller than it actually is (Belluz, 2008). Small populations are
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