we spend billions to find life on other planets — and trillions to kill life on earth

There is a particular ache in the way we look up. Telescopes polished like holy relics, rovers named Perseverance and Curiosity — we pour $8 billion into a single Martian mission to sniff out one ancient microbe. And we do it with reverence, because that microbe would mean we are not alone. It would mean life is not a freak accident. But even as we stretch our hands toward the cosmos, the same hands sign cheques for defence budgets that make the search for E.T. look like pocket change: $2.4 trillion in a single year. That’s the global military spending in 2023. Trillions, with a T, to ensure we can end life here — quickly, efficiently, at scale.

The numbers feel abstract until you hold them next to each other. The entire 50‑year history of planetary science — every flyby, every lander, every orbiter, every deep‑space anthem — could be funded hundreds of times over with what the world spends on armies in eighteen months. And yet we call ourselves explorers. We frame the search for extraterrestrial life as one of humanity’s noblest pursuits. But what kind of noble creature spends thirty times more on the capacity to kill than on the capacity to discover?

There’s a particular human genius in this contradiction. We can build an instrument sensitive enough to detect a single amino acid on a comet, yet we can’t seem to muster the will to feed the 800 million who go to bed hungry. We send messages toward the stars encoded with our greatest hits — Bach, birdsong, a kiss — while our news feeds fill with the faces of children who won’t see the morning. We want aliens to know our best self. But the best self is not the only self. The other self spends trillions on weapons and calls it “national security.” The other self builds walls, not telescopes.

I think about the Voyager Golden Record often. Carl Sagan and his team chose sounds of Earth: wind, thunder, crickets, a mother’s hello, a kiss. They did not include the sound of an air strike, though that is also Earth. They did not include the sound of a refugee camp, though that is also us. They wanted to show an alien civilization our potential, not our pathology. But what good is a golden record if, before it ever reaches another world, we’ve used the trillions to make our own world uninhabitable? The silence we fear from the cosmos may one day be answered by our own silence — a planet hushed by its own hand.

There’s a number that haunts me: $91 billion. That’s roughly the annual budget of NASA — the agency that touches stars, that sends our longing past the heliopause. And in that same year, the world likely spent $2,400 billion on militaries. Thirty times more to cultivate death than to cultivate wonder. If we simply redirected a fraction — say, 10% of the global military budget — we could fully fund not only NASA but every space agency on Earth, plus erase most infectious diseases, plus transition half the world to clean energy. But we don’t. Because fear sells. Because there is profit in steel and explosives. Because killing, it turns out, is a more reliable industry than hoping.

Maybe that’s the deepest wound: we are capable of so much more. We can design a helicopter that flies in the thin air of another world. We can catch a piece of a comet and bring it home. We can look back at Earth from Saturn and see a “pale blue dot” — and for a moment, feel that we are one family, one fragile crew. That feeling is real. It’s as real as the missile programs, as real as the treaties we break. And it’s that feeling that makes the contradiction so unbearable. Because we know, deep down, that life is the only miracle. And we are spending trillions to end it.

What would it take to shift the balance? Maybe the discovery of extraterrestrial life itself. If we found even a fossil on Mars, or a flicker of metabolism in the clouds of Venus, would it finally shame us into preserving the riot of life on our own world? Or would we simply add that world to the list of places we might one day militarise? I don’t know. But I do know that the numbers are choices. The trillions are not a fact of nature like gravity; they are a product of parliaments, of contracts, of collective will. And that means we could choose differently. We could choose to make the search for life — all life, here and beyond — our real priority. We could spend as much on healing as we do on harming.

Until then, we remain the species that looks up and asks, “Are we alone?” while digging mass graves for the life we already have. And the stars, if they could answer, might say: you are alone — because you made yourselves so.