"I believe the world is more dangerous than it used to be" I don't understand this belief. Since the 90's, we've lived in a world without a nuclear armed super

"I believe the world is more dangerous than it used to be" I don't understand this belief. Since the 90's, we've lived in a world without a nuclear armed superpowers with a hostile relationship. Trade has made war so costly that developed nations just don't do it with each other anymore. More Americans die trying to end civil wars in other countries than die from terrorism. At this point, we should be reaping a peace dividend not only in dollars, but in rights. Members of Congress have tried to justify the revelations about spying on Americans by claiming that it has prevented a terrorist attack. If a decade of spying on Americans prevents just one 9/11-scale attack, I'd choose the attack. Three thousand deaths over a decade is a rounding error. Let's start a war on traffic accidents and metabolic syndrome instead.