Karl Sagan, author and astrophysicist from Cornell, used to wonder if atomic weaponry would be the nemesis of most "advanced species".
A flight of fancy of sorts since whales and elephants are certainly advanced species but don't feel the need for technology (and should we patronize them for this since they aren't rapidly destroying the planet?). Is it possible that much of science and technology are actually synonyms of self destructive stupidity? A kind of short sighted greed, perhaps.
In any event, what has now TOTALLY blocked the evolution of the human species is pure evil. The Israeli lunatic right wing fringe of astronomically rich sociopaths is the absolute outer limit of evil. Similarly, so do all mentally ill religious fanatics poison the march of human civilization. And, probably most of all, the Earth's Paris Hilton's and astronomically rich parasites (and vampires -- remember, it's all really OUR wealth), necessitate convoluted social/financial structures and processes which are the "crown of thorns" or highway to hell (or your metaphor of choice) for Homo sapiens.
Maybe the wrong species got killed off during the demise of the Neanderthals.
Remember, "human" is a generic word that evolution has experimented with in actually a great many forms -- we're just the form that is still standing.
But what's the problem? Not a candy ass "religious" problem or a candy ass "political" problem but THE problem? Why is our species well on its way to going extinct? Indeed, why is it a near certainly that Home sapiens are going bye bye in the relatively near future (and taking countless "innocent by stander" species with us in the process)?
Well, the afore mentioned right wing billionaire religious nut cases would be a good place to begin, because probably no place else on the planet can you find such a marriage in hell between infinitely righteous religious sociopaths and astronomically rich elites.
However, alas, they are just a sample of evil, since evil is as omnipresent as our breath.