Economics
Breaking a window doesn't boost the economy, even though a repairman gets paid
Frédéric Bastiat imagined a shopkeeper's window smashed by a careless boy. Onlookers say it's good for the economy — the repairman earns money he'll spend elsewhere. But that money would have bought the shopkeeper something else entirely; the town isn't richer, it just has a repaired window instead of a window and something new.