> But "what if?" can work both ways. Going a little off topic, I've always felt someone could make a decent sci-fi story from that: what would the world look l

> But "what if?" can work both ways. Going a little off topic, I've always felt someone could make a decent sci-fi story from that: what would the world look like if everyone had the ability to irrecoverably alter a single decision from their past? Would it be wasted on trivial matter? Would it drive people crazy to have such uncertain power and never know if/when they should use it? Would people not use it out of principle?