The world will be what it will be for human beings—never static, always a hot churning mixture of hope and despair, beauty and carnage, good works and evil deeds. Some eras, though, seem perched on a particularly thin knife’s edge, the odds of falling into a hellish pit rather than a featherbed being higher than normal. Signs seem pretty strong we are in such an era today. Given the deep and angry divisions currently confronting not only our country but the larger world,, we’d be fools not to worry for its future. We’d also, of course, be fools to worry…