Has Earth finally and permanently outstripped the planet's ability to support us?
Investor Jeremy Grantham of GMO recently published a startlingly depressing outlook for the future of humanity. Grantham thinks the number of people on Earth has finally and permanently outstripped the planet's ability to support us.
Grantham believes that the planet can only sustainably support about 1.5 billion humans, versus the 7 billion on Earth right now (heading to 10-12 billion).
Basically, Grantham thinks most of us are going to starve to death. Why?
In part because we're churning through a finite supply of something that is critical to our ability to produce food: Phosphorus.
Phosphorus is a critical ingredient of fertilizer, and there is a finite supply of it. The consensus is that we will hit "peak phosphorus" production within a few decades, after which point our phosphorus supply will inexorably decline. As it declines, we will be unable to feed ourselves. And you know the rest.
Of course, ever since Malthus, a steady stream of doomsayers have predicted a ghastly end to the human population explosion--and, so far, they've all been wrong.
So why is a man of Grantham's intelligence adding his voice to this chorus?And how real is this threat? Are we all going to starve?
Humans have been around for a while. But for most of our existence, our population was small and stable. Then it exploded.
Most of this explosion has come in the past 200 years--just as Malthus predicted. What Malthus did not foresee was the discovery of oil, commercial fertilizer, and other resources, which have (temporarily) supported this population explosion.
Take oil, for example. Oil traded at about $16 a barrel for a century. Then, as demand outstripped supply, the "normal" price increased to ~$35 a barrel. Now, Grantham thinks "normal" is about ~$75 a barrel
Over the past century, the world has produced ever more food from the same (relatively) finite supply of arable land. For example, this chart shows global wheat production in the past 50 years. The blue line is farmland. The yellow line is total wheat production. The pink line is "yield per hectare." Production is rising because yield is increasing.
In the past half-century, we have used an ever-increasing amount of fertilizer. Not just in total, but per acre. This chart, for example, shows the number of tons of fertilizer used per square kilometer of farmland.
And this leads us to the first problem. 40 years ago, the average growth rate of crop yields per acre was an impressive 3.5% per year. This was comfortably ahead of the growth rate of global population. In recent years, however, the growth in crop yields per acre has dropped to about 1.5%. That's dangerously close to the growth of population.
Phosphorus (P) is essential for life. Plants absorb it from fertilized soil, and then animals absorb it when they eat plants (and each other). When the plants and animals excrete waste or die, the phosphorus returns to the environment. Eventually, given enough time, it gets compressed into rock at the bottom of the ocean.
Phosphate is a critical ingredient of fertilizer, and there is no substitute for it (because plants are partially made from it). This photo shows the difference between corn fertilized with phosphorus (background) and corn without.
The trouble is that there isn't an infinite amount of phosphate rock. Estimates differ on the amount of reserves available in the world, but they're not unlimited. Some scientists think we have enough to last hundreds of years. Others, however, are far less optimistic.
Not necessarily. It turns out that our urine and feces contain a lot of phosphorus--which is why they make good fertilizer. If we got serious about recycling our bio-waste, we could reduce our need for phosphate rock.
But although conservation and recycling will help, they won't fix the problem. Because a huge amount of phosphorus will still be lost to runoff. Phosphate that isn't consumed by plants leaches out of the soil into rivers and then to the ocean.
So, why is all this happening now, when the global population has been exploding for two centuries? The answer, in part, is the spectacular growth of China, India, and other massive countries. The resource-usage of these countries is mind-boggling. Here, for example, are Grantham's estimates of the percentage of world consumption of various resources that are consumed by China alone.
Common sense will tell you that finite resources can't support infinite growth. And another look at the "growth curve" of human population shows why it might be silly to dismiss Malthus, et al, as "obviously wrong." (Maybe they were just early).
Without the financial support that many white families can provide, minority young people have to continually make sacrifices that set them back.
The year after my father died, I graduated from grad school, got a new job, and looked forward to saving for a down payment on my first home, a dream I had always had, but found lofty. I pulled up a blank spreadsheet and made a line item called “House Fund.”
That same week I got a call from my mom—she was struggling to pay off my dad’s funeral expenses. I looked at my “House Fund” and sighed. Then I deleted it and typed the words “Funeral Fund” instead.
My father’s passing was unexpected. And so was the financial burden that came with it.
For many Millennials of color, these sorts of trade-offs aren’t an anomaly. During key times in their lives when they should be building assets, they’re spending money on basic necessities and often helping out family. Their financial future is a rocky one, and much of it comes down to how much—or how little—assistance they receive.
The Islamic State is no mere collection of psychopaths. It is a religious group with carefully considered beliefs, among them that it is a key agent of the coming apocalypse. Here’s what that means for its strategy—and for how to stop it.
What is the Islamic State?
Where did it come from, and what are its intentions? The simplicity of these questions can be deceiving, and few Western leaders seem to know the answers. In December, The New York Times published confidential comments by Major General Michael K. Nagata, the Special Operations commander for the United States in the Middle East, admitting that he had hardly begun figuring out the Islamic State’s appeal. “We have not defeated the idea,” he said. “We do not even understand the idea.” In the past year, President Obama has referred to the Islamic State, variously, as “not Islamic” and as al-Qaeda’s “jayvee team,” statements that reflected confusion about the group, and may have contributed to significant strategic errors.
The competition is fierce, the key players are billionaires, but the path—and even the destination—remains uncertain.
The race to bring driverless cars to the masses is only just beginning, but already it is a fight for the ages. The competition is fierce, secretive, and elite. It pits Apple against Google against Tesla against Uber: all titans of Silicon Valley, in many ways as enigmatic as they are revered.
As these technology giants zero in on the car industry, global automakers are being forced to dramatically rethink what it means to build a vehicle for the first time in a century. Aspects of this race evoke several pivotal moments in technological history: the construction of railroads, the dawn of electric light, the birth of the automobile, the beginning of aviation. There’s no precedent for what engineers are trying to build now, and no single blueprint for how to build it.
Critics of the HIV-prevention pill say it's not as good as safe sex. That's a false comparison, and a dangerous one.
On Monday, August 3, I tested positive for HIV.
That night, I sat on the sofa in my friend’s high-rise apartment in downtown Miami, peering down at the grainy, sodium-vapor-lit sprawl. I related the story of an older friend who’d tried to console me by saying HIV-positive people stay healthy. His words, while well-intentioned, only served to amplify the generational difference between us: Gay millennials, when they think of HIV, think more about dating than about death. On my way over, I’d seen couples walking together and thought about how I’d likely never have that—so many people I might have coupled with, all lost opportunities now.
For men in America with access to healthcare, HIV isn’t usually fatal. But it’s stigmatizing, expensive, and permanent.
In the name of emotional well-being, college students are increasingly demanding protection from words and ideas they don’t like. Here’s why that’s disastrous for education—and mental health.
Something strange is happening at America’s colleges and universities. A movement is arising, undirected and driven largely by students, to scrub campuses clean of words, ideas, and subjects that might cause discomfort or give offense. Last December, Jeannie Suk wrote in an online article for The New Yorker about law students asking her fellow professors at Harvard not to teach rape law—or, in one case, even use the word violate (as in “that violates the law”) lest it cause students distress. In February, Laura Kipnis, a professor at Northwestern University, wrote an essay in The Chronicle of Higher Education describing a new campus politics of sexual paranoia—and was then subjected to a long investigation after students who were offended by the article and by a tweet she’d sent filed Title IX complaints against her. In June, a professor protecting himself with a pseudonym wrote an essay for Vox describing how gingerly he now has to teach. “I’m a Liberal Professor, and My Liberal Students Terrify Me,” the headline said. A number of popular comedians, including Chris Rock, have stopped performing on college campuses (see Caitlin Flanagan’s article in this month’s issue). Jerry Seinfeld and Bill Maher have publicly condemned the oversensitivity of college students, saying too many of them can’t take a joke.
A black student posted “White Only” signs on water fountains to highlight systemic racism—and provoked an uproar.
In the middle of September, students arrived on campus at the State University of New York at Buffalo to find “White Only” and “Black Only” signs plastered near elevators, water fountains, benches, and bathrooms. It was not immediately clear who put up the signs. But they summoned an era when segregation on the basis of skin color was the law of the land.
The backlash—on campus and across social media—was swift. The incident touched off a tense debate over racism and free speech that is still unfolding more than two months after the signs were taken down.
Ashley Powell, a black graduate student, created the signs as part of a project for a class offered by the Art Department. She says that reaction was exactly the point. “The signs are a reminder that just because you can’t see racism around you doesn’t mean it’s not there,” Powell said in an interview. “I wanted people to feel something. I wanted people to realize they must confront racism and fight against it in their daily lives.”
The cards Overweight Haters Ltd. is handing out to passengers on the Tube aren’t just cruel; they’re ineffective.
They come every year around this time, as reliably as the chilling of the air and the preponderance of red coffee cups: the public-relations pitches, bedecked in exclamation points and cheer, offering expert tips on how to fight the holiday weight, or win the battle of the bulge, or stay svelte through New Year’s. If I had a nickel for every email in my inbox right now exhorting me to put down the pie, I’d have enough money to buy myself several more pies. Not the grocery-store brand, either. The fancy bakery kind.
‘Tis the season, in other words, to make some strangers feel bad about their bodies. Over the weekend, some people in London, purportedly from a group called Overweight Haters Ltd., took that to heart:
Managers who believe themselves to be fair and objective judges of ability often overlook women and minorities who are deserving of job offers and pay increases.
Americans are, compared with populations of other countries, particularly enthusiastic about the idea of meritocracy, a system that rewards merit (ability + effort) with success. Americans are more likely to believe that people are rewarded for their intelligence and skills and are less likely to believe that family wealth plays a key role in getting ahead. And Americans’ support for meritocratic principles has remained stable over the last two decades despite growing economic inequality, recessions, and the fact that there is less mobility in the United States than in most other industrialized countries.
This strong commitment to meritocratic ideals can lead to suspicion of efforts that aim to support particular demographic groups. For example, initiatives designed to recruit or provide development opportunities to under-represented groups often come under attack as “reverse discrimination.” Some companies even justify not having diversity policies by highlighting their commitment to meritocracy. If a company evaluates people on their skills, abilities, and merit, without consideration of their gender, race, sexuality etc., and managers are objective in their assessments then there is no need for diversity policies, the thinking goes.
Maya Arulpragasam is a famous rapper, singer, designer, producer, and refugee. When she was 9, her mother and siblings fled violence in Sri Lanka and came to London, and the experience was formative for her art. As she explained to The Guardian in 2005 after the release of her debut Arular, “I was a refugee because of war and now I have a voice in a time when war is the most invested thing on the planet. What I thought I should do with this record is make every refugee kid that came over after me have something to feel good about. Take everybody’s bad bits and say, ‘Actually, they’re good bits. Now whatcha gonna do?’”
That goal—to glorify people and practices that the developed world marginalizes—has been a constant in her career. Her new music video tackles it in a particularly literal and urgent way, not only by showing solidarity with refugees at a moment when they’re extremely controversial in the West, but also by posing a simple question to listeners: Whose lives do you value?
The generation has been called lazy, entitled, and narcissistic. Their bosses beg to differ.
Yes, many Millennials are still crashing on their parent’s couches. And there’s data to support the claim that they generally want more perks but less face time, and that they hope to rise quickly but don’t stick around for very long. Millennials have also been pretty vocal about their desire to have more flexible jobs and more leave time.
But does all of this mean that all Millennials are actually worse workers?
Laura Olin, a digital campaigner who ran social-media strategy for President Obama’s 2012 campaign, says that’s not been her experience. “You always hear about Millennials supposedly being entitled and needing coddling, but the ones I’ve encountered have been incredibly hard-working and recognize that they need to pay their dues.”