The Hedonic Treadmill
You get the raise, the car, the win. Three months later you feel exactly the same. Here's why.
Grounded in the research on the hedonic treadmill
1. You set a baseline
Everyone has a resting level of happiness they keep drifting back to. Psychologists call it a set point. Sonja Lyubomirsky's research pins roughly 50% of it to genes and temperament, the part you're basically stuck with. That baseline is the gravity in this whole story. Good stuff lifts you above it, bad stuff drops you below it, and then you fall back. Knowing the baseline exists is the first step.
2. Something great happens
You get the promotion, hit the bag, move into the nicer place. Real spike. For a few days or weeks you genuinely feel better and you swear this one is permanent. Donald Campbell and Philip Brickman named the effect in 1971: hedonic relativism. The catch they spotted is that your brain doesn't measure happiness in absolute terms. It measures the change. And a change, by definition, doesn't last.