Zero-sum thinking means believing that if someone else wins, you lose. It's the opposite of seeing the world as full of win-win opportunities where multiple people can succeed simultaneously. And according to new research, young people are significantly more likely than older adults to see the world this way.

The question is: are they pessimistic, or rational?

Researchers analyzed data from the World Values Survey, a longitudinal study spanning decades and over 100 countries. The pattern held consistent across time periods (1990s through mid-2010s) and cultures: younger adults viewed situations as zero-sum far more often than older adults.

Initially, you might assume this is about cognitive development or life experience. Maybe younger people just haven't learned to see nuance yet. The researchers tested that hypothesis. Cognitive capacity differences did not explain the results.

What did correlate with zero-sum beliefs? Two variables: resource scarcity and positive thinking tendencies. People facing financial constraints adopted zero-sum perspectives more readily. Those with more optimistic outlooks were less likely to view the world as a competition for fixed resources.

Here's where it gets interesting. Older adults generally experience greater financial security and report more positive outlooks. So the generational difference in zero-sum thinking isn't just about psychology—it's potentially about material conditions.

Let's look at the economics. In the United States, the median home price in 1980 was roughly 3x the median household income. By 2023, that ratio had nearly doubled to 5-6x. Student loan debt has exploded from negligible in the 1970s to over $1.7 trillion today. Real wage growth for young workers has stagnated for decades, even as productivity increased.

Boomers entering the workforce in the 1970s and '80s faced lower housing costs relative to income, cheaper education, and stronger wage growth. Millennials and Gen Z entered the workforce during the 2008 financial crisis and a pandemic, with higher costs of living and less job security.

From that perspective, zero-sum thinking isn't irrational pessimism. It's an accurate assessment of the economic landscape. If housing, education, and healthcare are increasingly expensive and wages aren't keeping pace, then yes—someone else buying a house does make it harder for you to afford one. That's literally how supply and demand work.

The research also found that zero-sum beliefs influence policy preferences. For example, people with zero-sum views on immigration tend to support restrictive policies, assuming that immigrants "take" jobs or resources from existing residents. Those who recognize economic expansion possibilities favor more open immigration, seeing it as potentially beneficial to everyone.

This matters because zero-sum thinking affects well-being, trust, and social cohesion. If you believe every interaction is competitive, you're less likely to cooperate, share resources, or support policies that benefit others even when they might benefit you indirectly.

But here's the tension: dismissing younger people's zero-sum beliefs as naive or pessimistic ignores the material reality they're responding to. If the economic pie isn't growing for them the way it did for previous generations, then treating the world as zero-sum isn't a cognitive error—it's an adaptation to scarcity.

Now, the researchers were careful not to editorialize. They presented correlations, not causal claims. But the data invites an uncomfortable question: are younger people wrong about the world being zero-sum, or have we built an economy that actually is?

The universe doesn't care what we believe. Let's find out what's actually true.