Yes, The human race is its own worst enemy. I mean, let's use the instance - a nuclear bomb - quite a few countries around the world has thousands of them. In addition to their natural destructive force, they also tend to pollute the said area with radiation for decades, making that particular area uninhabitable for humans and wildlife. It's not like we are constantly being invaded by aliens and they could be somewhat useful in turning the tide of a battle against them. Instead, they are made to protect countries from each other... the worst part about it is the nuclear bombs of today are exponentially more powerful than the ones used on the Japanese. If just a couple of those were to go off, it may very well end life on this planet in an instant.