“Life and study have persuaded me of the openness of history. There is no inevitability in history. Thinking about what might have happened, what could have happened, is a necessary element in trying to understand what did happen. And if, as I believe, individual acts of decency and courage make a difference, then they need to be recorded and remembered.”

“History is not usually what has happened. History is what some people have thought to be significant.”

“There is history the way Tolstoy imagined it, as a great, slow-moving weather system in which even tsars and generals are just leaves before the storm. And there is history the way Hollywood imagines it, as a single story line in which the right move by the tsar or the wrong move by the general changes everything. Most of us, deep down, are probably Hollywood people. We like to invent “what if” scenarios--what if x had never happened, what if y had happened instead?--because we like to believe that individual decisions make a difference: that, if not for x, or if only there had been y, history might have plunged forever down a completely different path. Since we are agents, we have an interest in the efficacy of agency.”

“What happened, and what might have happened?”

“A historian tries to understand what happened, why it happened, what was the context, who did what, and what assumptions led them to act as they did. A historian customarily displays a certain diffidence about trying to influence events, knowing that unanticipated developments often lead to unintended consequences.”

“There are just lots of possibilities in the world...I need to keep my mind open for what could happen and not decide that the world is hopeless if what I want to happen doesn't happen. Because something else great might happen in between.”