They could do anything. That, however, was part of what made it difficult to bring [it] to a close. Infinite possibility was going to collapse, in the act of choosing, to the single world line of history. The future becoming the past: there was something disappointing in this passage through the loom, this so-sudden diminution from infinity to one, the collapse from potentiality to reality which was the action of time itself. The potential was so delicious— the way they could have, potentially, all the best parts of all...time, combined magically into some superb, as-yet-unseen synthesis— or throw all that aside, and finally strike a new path to the heart of just government. . . .To go from that to the mundane problematic...was an inevitable letdown, and instinctively people put it off.
Kim Stanley Robinson, Blue Mars
choice, potential