We are living in a dangerous world. The world by itself is not dangerous. It becomes dangerous by some people living in it. Those who can push a button that annihilates existence as we know it, and those who have the power to destroy the environment for profit, are the same, a few, and in power.
When the United States government gained access to nuclear power, tested it in Hiroshima and Nagasake and as a result, killed and injured near half of the population of those cities. Of course, the casualties of nuclear bombs continue through the generations to this day. On the other hand, environmental depredation of the current years are wake up calls to those who seek profits for a few corporations, over humanity at large.