well it's pretty obvious that a gun is more efective than an arrow. US is the most powerful country now, but it isn't dominant (see Syria, Crimea, etc..) and i

well it's pretty obvious that a gun is more efective than an arrow. US is the most powerful country now, but it isn't dominant (see Syria, Crimea, etc..) and it not as dominant as the British Empire or the Roman Empire was at their time