Two types of choices seem to me to have been crucial in tipping the outcomes [of the various societies' histories] towards success or failure: long-term planning and willingness to reconsider core values. On reflection we can also recognize the crucial role of these same two choices for the outcomes of our individual lives.
Reconsideration creates a great opportunity for you to contemplate a previous decision, opinion, action, behavior, or position. “Second-guessing” can at times be very helpful. Have you ever felt strongly about something, but when you reconsidered new information which came to light you changed your position?