Lieberman and Long’s central claim: dopamine doesn’t reward
pleasure itself — it rewards the pursuit of it, driving desire, anticipation,
and craving for whatever comes next.
Lieberman, a professor of psychiatry and behavioral science, and Long, a
science writer, lay out a “here and now” versus “future” framework for the
brain’s major neurochemicals. Dopamine, they argue, is a future-oriented
molecule — it fires hardest for what’s new, uncertain, or not yet possessed —
while a separate set of chemicals (serotonin, oxytocin, the endorphins)
produce the calmer satisfaction of enjoying what a person already has, right
now, in front of them.
Applied to romantic relationships, the book argues that the intense wanting
of early “passionate love” is a dopamine surge, and that it naturally fades
as a couple becomes familiar and the relationship shifts toward the “here and
now” chemistry of steady, secure bonding. It treats that shift as normal, not
a sign the relationship is dying — while also arguing that novelty and
anticipation, deliberately reintroduced, can reawaken some of that early
charge.