Let’s think about a situation where you’re driving a runaway trolley car. Up ahead are five workers on the track. You can’t stop, but you can turn onto a side track where there’s just one worker. What’s the right thing to do?

Most of us intuitively say, “Turn the wheel.” It seems like a no-brainer, right? Better that one person should die if it means five people get to live and go home to their families. In this view, morality is really about the math of human happiness. It’s about the results. If we can minimize suffering and maximize survival, we’ve done the right thing. It’s practical, it’s measurable, and it seems to make sense.

But let’s test that logic, because things get messy fast. Suppose you aren’t the driver, but an onlooker on a bridge. To save those same five workers, you would have to shove a heavy stranger off the bridge to block the tracks. The math is exactly the same one life for five but suddenly, our gut tells us no. Why the hesitation?

Or take a real-life crisis at sea: starving survivors on a lifeboat kill and eat a sick cabin boy to stay alive. They argue necessity; three survived because one died. When we hesitate in these cases, we are bumping up against the idea that maybe some actions are just inherently off-limits, no matter how many people we might save.

Let’s pause and unpack this. If we agree that five lives are more valuable than one, why should the method of saving them matter so much? Is a life saved by turning a steering wheel somehow more valuable than a life saved by pushing someone, or using a lottery, or even drawing a knife in a desperate lifeboat?

If our ultimate goal as a society is to protect as many people as possible and reduce overall agony, can we really afford to let our emotional squeamishness or abstract rules stand in the way of the greater good? If the math of human survival is clear, should our personal feelings about the method really override the best possible outcome for the group?