Deciding whether or not to have children is a deeply personal choice for any individual, but an increasing resistance to becoming a parent now presents challenges to society as a whole.

The crude birth rate in the U.S. has dropped by more than half since the 1960s. Per the St. Louis Fed, sixty years ago approximately 24 babies were born per 1,000 people, in 2022 that figure stood at 11.

This drop—combined with the fact that the nation’s population is living longer—is a serious concern for economists who question how economies will function with fewer people available to do the work.

Melinda Mills is a professor of demography and population health at Oxford University’s Nuffield Department of Population Health. Mills explains: “Sustained low fertility combined with longer life expectancy results in aging populations.

“This causes strains in the labor market such as health care for older populations, the closing of schools, rethinking housing and infrastructure, and rethinking pension systems and age of retirement.”

The resulting drop in GDP from this aging population could be as much as 4%, James Pomeroy, HSBC’s global economist, previously told Business Insider.

Are Americans having fewer kids?

Previously experts believed that economies would see a post-COVID “baby bump,” spurred by a brief uptick in births in 2021.

But data from 2022 and 2023 made it clear births were reverting back to their pre-pandemic trend with couples increasingly choosing a dual-income-no-kids (DINK) lifestyle, as the CDC reported last year that in 2023 U.S. fertility rates fell to a historic low of about 55 births for every 1,000 females ages 15 to 44.

“In a low-fertility scenario, the number of people of the traditional working age could start falling within 20 years,” Pomeroy wrote in his latest note on the subject, though Mills warned the tension between fewer births and an older population is already being felt.

She explained many countries are already struggling to fill health care positions, which previously had relied on migrant workers to fill.

“This has happened in the U.K., for instance where in 2022 around 33% of migrants were to work in the health care system,” Mills, director of the Leverhulme Centre for Demographic Science, told Fortune.

“This has also caused political tensions, with countries increasingly facing choices related to sustaining the labor force and pension systems while also thinking about reskilling or urging existing inactive populations into the labor market.”

For HSBC’s Pomeroy, this will have concrete efforts on people’s daily lives: “You’ll find it more difficult to find somebody to cut your hair, do your nails, set up the X-ray machines at the hospital. The sheer decrease in the number of people…becomes a problem.”

What are millennials having fewer children?

Young people have plenty of reasons not to want kids right now: expensive childcare, an unaffordable housing market, high costs of groceries and household essentials, career disruption, and concerns for the future of the planet.

A Pew Research study from July 2024 spoke to more than 3,000 people who either haven’t had children or don’t plan to.

Of those aged between 18 and 49—who fall predominantly into the Gen Z and millennial generations—who said they didn’t plan on having children, the top reason is simply that they didn’t want to or wanted to focus on other things.

Additionally, 38% said they didn’t want to have children because they were concerned about the state of the world, and 36% said they couldn’t afford to raise a child.

A further 26% said they didn’t want to have children because of environmental concerns and 24% said they wouldn’t have children because they hadn’t found the right partner.

One factor impacting birth rates is also women’s increasing power and influence within the economy.

Mills explains: “The main reasons are manifold, including shifts such women obtaining higher education and remaining in the labor market, work-family reconciliation, but also housing problems, gender equality, and uncertainty for the future.

“The age at first birth is also above 30 in many countries for women and even higher for men at 32 and older. This also causes increasingly biological limits of fertility.”

Couple ask if they can have a career and a baby

Another consideration for many DINK couples is the freedom they can enjoy in their careers if they don’t have the pressure of children to provide for.

Heather Maclean and her husband Scott Kyrish told Fortune in 2023 that the choice not to have children has allowed them to have a “rose and gardener” approach to their careers—the idea that while one person can grow and take risks, the other remains the stable supporter.

“I never thought I’d quit my job to try and write a book. It was never something I saw as an option,” Maclean said.

“But then I took the time to think about what I really wanted to do if I could do anything, and it took a lot of convincing and months of assurances that I could take the time off and afford it, to decide to do it.”

A version of this story originally published on Fortune.com on Nov. 19, 2024.

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This story was originally featured on Fortune.com

State-of-the-art AI requires massive amounts of computing power, and only the largest companies can compete. Wouldn’t it be great if smaller outfits could challenge tech behemoths with their own AI algorithms? That’s what Pluralis Research thinks, and it’s one of a handful of startups that believes blockchains—essentially decentralized cloud computing networks akin to Amazon Web Services—may be the answer. 

On Wednesday, Pluralis announced that it had secured $7.6 million in pre-seed and seed funding, led by the venture capital firms CoinFund and Union Square Ventures. Topology, Variant, Eden Block, and Bodhi Ventures also participated in the round, along with prominent crypto investor Balaji Srinivasan and Clem Delangue, cofounder of the popular AI platform HuggingFace.

The raise was for equity, with a warrant for future cryptocurrency—if Pluralis decides to launch one, Alexander Long, founder and CEO, told Fortune.

For now Pluralis doesn’t have a product, meaning investors are primarily betting on Long and the veteran team of AI researchers he’s assembled. “I raised the round on, ‘This team is the right team to try and tackle this problem’,” Long said. “No one else is trying. We think we can do it.”

The Pluralis founder has a doctorate in computer science and worked at Amazon for more than three years as an AI engineer. He’s assembled seven other computer scientists, all with doctorates or stints as postdoctoral researchers, to see if it’s possible to build powerful AI algorithms through a decentralized network of servers.

Currently, top-flight AI requires fleets of expensive computers in a warehouse working together to train massive algorithms. Researchers estimated that it took 1,300 megawatt hours of energy, or about as much electricity consumed by 130 U.S. homes in a year, to produce an earlier version of OpenAI’s GPT model, or algorithm. This costs money, which means the only firms that can win the AI arms race have large pockets.

For crypto founders, whose technology is predicated on the ideal of decentralization, the idea that a few corporations could wield so much power is a problem, which is why some AI researchers have begun to think about how to create, or train, powerful AI algorithms through a decentralized network of servers. Gensyn, Prime Intellect, and a handful of firms are already exploring the possibility.

Pluralis’s approach is different, Long said. Most attempts at training AI through a network of decentralized computers require those computers to download the entire model. If the servers are small, that puts a ceiling on the size—and power—of a model. Long wants to research whether it’s possible to train portions of a model, rather than the whole model itself, on one computer. “If you can make the problem precise enough, it often leads to immediate ways you can start to solve it,” he said.

Investors believe Long, who has already started his research, may be on his way, and they have enough faith in him and his team that they’re willing to make a bet—even if it’s a longshot. “If this works out,” Jake Brukhman, founder and CEO of CoinFund, proclaimed to Fortune, ”this is going to change the world.” 

This story was originally featured on Fortune.com

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