And to answer the Freedom vs Security, it would appear that Mr. Orwell nailed it..............................

“The choice for mankind lies between freedom and happiness and for the great bulk of mankind, happiness is better.”

"So, what are we going to do now? What lessons from history have we learned that we can apply now to change the future?"

The lesson we should learn is that we should never ever forget what happened in the past for that is the History, once forgotten is soon repeated again. And once forgotten it leaves the door open to be rewritten and falsified.

Again from George Orwell..........................

“He who controls the past controls the future. He who controls the present controls the past.”

And as was quoted in another thread ....................
"Every record has been destroyed or falsified, every book rewritten, every picture has been repainted, every statue and street building has been renamed, every date has been altered. And the process is continuing day by day and minute by minute. History has stopped. Nothing exists except an endless present in which the Party is always right.”
― George Orwell, 1984"