It’s so hard for people to get out of the notion that life is a zero-sum game. They think if one man benefits, another must lose. But in a free market, both people can benefit.

When both sides think they're winning

Most of us inherited this scarcity mindset without realizing it. When someone else gets the job, the promotion, the partner's attention—we feel like we've lost something. It's hardwired into us from childhood competition and playground economics. But Friedman points at something worth noticing: a transaction only happens when both sides think they're winning. You buy coffee because you value it more than the money; the barista values the money more than the coffee. Nobody forced that trade.

The tricky part is recognizing where this applies and where it doesn't. A business deal between strangers? Sure, probably mutual gain. But politics, relationships, and status often do operate more like zero-sum games, which is why pure market thinking breaks down in real life. A partner's success can feel like a threat to your relevance. A colleague's raise can sting even if it's fair.

The real insight here isn't about economics—it's about breaking the habit of assuming scarcity. When you're stuck believing every good thing for someone else is bad for you, you stop looking for the trades where you both come out ahead. You become rigid, defensive, resentful. The people who navigate life best seem to hold both truths: markets can create genuine win-wins, but not everything works like a market. Knowing the difference matters more than the philosophy you start with.