Behavioral addiction is now as real as substance addiction

Alter opens by dismantling the assumption that "addiction" requires a chemical substance entering the body. Neuroscience shows that behaviors — gambling, gaming, checking a phone — activate the same reward circuitry, centered on the neurotransmitter dopamine, as drugs do. The brain doesn't clearly distinguish between a chemical high and a behavioral one; both can produce escalating craving, tolerance, and withdrawal-like distress when access is removed.

The American Psychiatric Association's own diagnostic manual reflects this shift: gambling disorder was reclassified alongside substance addictions, and internet gaming disorder was added as a condition for further study. Alter treats this as an official crack in the old wall between "real" addictions and "just bad habits."

The stakes of this reframing are large: if checking Instagram can trigger the same neural loop as a slot machine, then the tools shaping billions of daily routines deserve the same scrutiny historically reserved for casinos and cigarette companies — not because using them makes someone weak, but because they are engineered to be hard to stop using.