America has much to be cocky about. It invented large-scale democracy and nurtured its growth around the world. It vanquished fascism and communism, became the world’s only superpower. And its entrepreneur-driven economy is again the envy of the world. The nation has also long had more than its share of heroes — people such as Louis Zamperini, whose amazing story of survival during World War II is the subject of the best-selling book, and new movie, Unbroken. Yet to look around the USA is to see fear and anxiety. If you didn’t know better, you’d think this was a nation of wimps.…