Win a generational jackpot and a year or two later you are, on average, no happier than before. This episode explores the hedonic treadmill, the built-in happiness set point that rises with every raise and purchase to keep lasting joy just out of reach. The hosts explain why perception depends on contrast, break down shifting adaptation levels, desensitization and sensitization, and revisit the famous late-1970s study comparing lottery winners, accident victims with paralysis and a control group.

The conversation then asks who sets the thermostat: a decade-long twin study attributing roughly half of happiness to genetics, hippocampus volume and dysthymia, BDNF-boosted mice that calmly endure stress, and a critique arguing identical twins may simply be treated identically by the world. Longitudinal panels show the baseline is soft for about a quarter of people, with long-term disability and unemployment dragging it down permanently, before the episode covers Gregg Easterbrook’s abundance denial, non-zero-sum goals that raise well-being, and transhumanist proposals like wireheading and engineered hyperthymia.

• Why a small unexpected bonus still sparks joy after a big salary becomes the new normal
• Accident victims rating themselves above the midpoint and expecting to recover
• The elastic band metaphor and negativity bias behind stickier bad events
• Cocaine studies in rats showing hedonic pathways chemically locked lower
• The god mode objection: would guaranteed bliss destroy human motivation?