"In our position as rulers of Earth"? Oh, hell yes. If you take the actions of those who decide how things will be done en masse as though they were condensed into one person, that person is unquestionably both stupid and evil. Wasteful, genocidal, oblivious, self-destructive, and with a remarkable lack of foresight, to boot.
But just to throw a wrench into things, on the individual level, I rather think most people are pretty good. Smart? Well... Maybe not. But good. I find the number of people who would steal from you, lie to you, hurt you largely for the sake of hurting you, and/or kill you is remarkably small, and I'm optimistic enough to think that it's more because most people would really rather get along with others and do good for others rather than that they think they're being watched and payback is a fang-toothed mongrel with twelve hungry pups. When there's a crisis- a drought, a blackout, a heavy snowstorm- it's often quite remarkable the extent to which people who are near-strangers will pitch in to help one another out. And I know that I, in my small way, try to do the same. I really don't think any community can exist for long without a multitude of small benevolent acts and resisted opportunities to do harm, performed every day.
The problem is that humans have a fairly remarkable ability to abdicate responsibility to those in authority. We believe the nine out of ten experts without ever looking at their credentials, and we frequently believe that if there was something wrong with the way we are presently doing things, someone [else] would have done something about it by now. And if someone actually has the temerity to suggest we do do something differently, we drag our heels at best, and become downright hostile (how dare you attack our blessed way of life, our forefathers have been doing things this way for generations, blah blah blah) at worst. Most of us are conditioned to strive, not for the best, but for a comfortable status quo.
And then we get to the people on the very top, and with some exceptions, that's where you find the real stupidity and evil. The stupidity to believe that your position actually qualifies you to make the big decision (and the fear of looking weak if you hesitate), the stupidity to believe the comforting assumption is the accurate one, and the sheer evil to know better and to take the way that is easy or rewarding in the short term or vindictive, despite that knowledge.
When someone's car is in a snow drift, we're all there to pitch in with shovels. When (for example) wasteful use of water, overfishing, monoculture crops and feedlot practices forewarn massive starvation?... Ah, I'm sure someone smart will figure out a solution without me having to give anything up.
Moo.