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“Modern medicine’s ability to keep us alive makes it tempting to think human evolution may have stopped. Better healthcare disrupts a key driving force of evolution by keeping some people alive longer, making them more likely to pass on their genes. But if we look at the rate of our DNA’s evolution, we can see that human evolution hasn’t stopped – it may even be happening faster than before.
Evolution is a gradual change to the DNA of a species over many generations. It can occur by natural selection, when certain traits created by genetic mutations help an organism survive or reproduce. Such mutations are thus more likely to be passed on to the next generation, so they increase in frequency in a population. Gradually, these mutations and their associated traits become more common among the whole group.
By looking at global studies of our DNA, we can see evidence that natural selection has recently made changes and continues to do so. Though modern healthcare frees us from many causes of death, in countries without access to good healthcare, populations are continuing to evolve. Survivors of infectious disease outbreaks drive natural selection by giving their genetic resistance to offspring. Our DNA shows evidence for recent selection for resistance of killer diseases like Lassa fever and malaria. Selection in response to malaria is still ongoing in regions where the disease remains common.”
JJ Editor's Daily Picks
"Political leaders from all French parties, including former presidents Francois Hollande and Nicolas Sarkozy, joined Jews and non-Jews in Paris’s Place de la Republique to condemn antisemitic acts."
"Eighty years ago tonight, thousands of Americans gathered in New York to rally behind the Nazi Party and its ideals. An Oscar-nominated short documentary retrieves footage of the event, but leaves out the context that gives it meaning."
"The PM has persuaded the religious-Zionist Jewish Home to partner with the Kahanists of Otzma Yehudit. It makes cynical political sense for his interests, but what of Israel’s?"
"IFC’s series Documentary Now! began as an affectionately parodic tribute to the classics of nonfiction cinema. Its first episode, “Sandy Passage,” was a note-perfect evocation of the Maysles brothers’ Grey Gardens..."
"Making our choices count is, however, far from straightforward, and this is the subject of Martin Hägglund’s book This Life: Secular Faith and Spiritual Freedom."
"Teens in the United States are coming of age at a time when digital technology is truly ubiquitous, where smartphones are all of our “constant companions.”"
"...the Smollett story, if the “trajectory” leads to evidence of fakery, would actually reveal something else modern America is about: victimhood chic."
"Cool in the humanities isn’t that different from cool in other areas of cultural life, like planking, hotdog-legs photography, mason jar rehabilitation, and novels whose main character is a city."
"It’s true that high-octane, hardworking child-rearing has some pointless excesses, and it doesn’t spark joy for parents. But done right, it works for kids..."
"Cape Town in South Africa is a foodie destination. Some people in its renowned restaurant industry are trying to spread the food wealth citywide."
"...for many “space expansionists,” escaping Earth is about much more than dodging the bullet of extinction: it’s about realizing astronomical amounts of value by exploiting the universe’s vast resources to create something resembling utopia. "
"After facing persecution in the former Soviet Union and a new wave of antisemitism in the United States, Marya Zilberberg decides to put her Jewishness on display."