Amid the recent spate of celebrity deaths, you may have missed Dan Haggerty’s. He played Grizzly Adams, from the show with the same name. Set in the days when mountain men still roamed the West, “Grizzly Adams” was one of several shows -- “Little House on the Prairie” and “The Waltons” come to mind -- that summoned up a bygone America to weave simple morality tales that often explored contemporary issues. Something Grizzly would say stuck with me: “A stranger is a friend I haven’t met yet.” Whatever happened to that America? How did we become an armed camp, fearful of strangers?