According to Jonathan Haidt, TikTok offers you new stimuli every few seconds. This bombards the brain with fast dopamine at ages when the brain is plastic. In doing so, it "rewires" the brain's reward system. That is why Gen Z, the first to have TikTok between the ages of six and twelve, has widespread attention difficulties and why when they reach adulthood they declare finding life empty of meaning, without purpose. Purpose is linked to the "slow dopamine" of rationality, the cause-effect relationship, learning, reading, temporal perspective...