In the past, destruction of your neighbour might have been considered a victory, but today we are all interdependent. We live in a global economy; we face problems like climate change that affect us all. The 7 billion human beings alive today belong to one human family. In the context that others' interests are in our interest and our interest is in their interest, the use of force is self-destructive.
If we could travel into the past, it's mind-boggling what would be possible. For one thing, history would become an experimental science, which it certainly isn't today. The possible insights into our own past and nature and origins would be dazzling. For another, we would be facing the deep paradoxes of interfering with the scheme of causality that has led to our own time and ourselves. I have no idea whether it's possible, but it's certainly worth exploring.
I do not believe that any man can adequately appreciate the world of to-day unless he has some knowledge of -- a little more than a slight knowledge, some feeling for and of -- the history of the world of the past.
A man who has broken with his past feels a different man. He will not feel it a shame to confess his past wrongs, for the simple reason that these wrongs do not touch him at all.
All persons are puzzles until at last we find in some word or act the key to the man, to the woman; straightway all their past words and actions lie in light before us.