Alternate Timelines Can’t Help You, Quantum Physicists Say
The real question, then, is not whether there are other timelines; there certainly are. Rather it is why we see only one. Perhaps life or intelligence would not be possible if the branching were too evident to us. Physics is replete with such preconditions for our existence. For instance, if temporal flow did not have a directionality—an arrow of time—there could be no lasting change, no memories, no intelligence, no agency. Keeping other timelines hidden might be of similar importance. Quantum superposition may serve some specialized functions in our bodies, but otherwise it—along with any traces of alternate timelines—is dissipated in biology’s vigorous exchange of material and energy with the environment. The very nature of intelligence is to be selective; we would be paralyzed if we had to assay boundless infinitudes. Rather than holding open all possibilities, a mind must settle—at least tentatively—on one. The effort required to make that choice—and, from there, to act upon it—may be key to giving us at least the subjective feeling of free will.