What is something specific that an individual should have done or should not have done, say, 2000 years ago, that would have made a positive impact on your life?
Certainly there are individuals who have had that kind of impact, but I don't think one could have foreseen the consequences at the time, e.g., Jesus and Mohamed.
Likewise, the guy who invented the Segway probably thought he was going to revolutionize personal transportation, but that didn't pan out (yet, at least).
