Why do people sometimes think about lives they never lived?
Humans live one life, but imagine thousands.
What if you had moved?\n\nWhat if you had said yes?\n\nWhat if you had stayed?\n\nThe hidden mechanism is parallel lives.\n\nHumans remember reality.\n\nBut they also remember possibilities.\n\nUnlived lives never fail completely.\n\nPeople think regret belongs to the past.\n\nVery often, it belongs to futures that never happened.
