Since I was child, Memorial Day has meant a canoe trip on the Ipswich River here in Massachusetts, and that’s where I am today, enjoying nature, unplugged. A small part of the day, as always, will be devoted to honoring those who made the ultimate sacrifice. But for me, a larger part will be devoted to wondering whether war will ever become obsolete as a tool for conflict resolution. In the long term, I’m optimistic that mankind will eventually evolve to put the practice of war behind us. War is destructive, and I’d rather be productive. But I’m not holding my breath.