Mindless on Instagram: "The human reward system is primarily governed by dopaminergic circuits in the brain, especially those involving the ventral tegmental area and the nucleus accumbens. Dopamine is not a pleasure chemical so much as a motivation and learning signal. It spikes in response to novelty, anticipation, and variable rewards, reinforcing behaviors that the brain believes are worth repeating. This system evolved to help humans survive by encouraging exploration, learning, and goal di