I don't think humankind is really much worse than it ever was. We have far more destructive power than we have in the past, but we've always treated each other, the planet, and the other beings we share it with rather poorly on the whole.
Greed has always fueled many people's ambitions. People have always been susceptible to trend-following and are often easily lead, especially when in groups. War, violence, injustice (and greed) - they're hardly new.
I think it's getting progressively worse.
Sweatshops are popping up everywhere, under-priveledged children and women are being used to gain money.
As stated, the more destructive power is used both directly (warfare) and indirectly (blackmail, threats) to gain power and end rivals in this race for power and money.
Greed has been a fuel, which is partly related to promise. The promise of riches and power of helping a said madman in a certain plot, incites greed. It's man affecting man with his wants.
My thoughts and intentions can incite feelings in you, as in what I said above - My plot to rule the world could bring the greed out in you if you help me. Get it?
One mans ill intent is more than just ill effects for the ones he directly affects, as others are having an impression made in them by it.
As said by the One Minute Silence song, "If I can Change":
If I can change one, then I can change two.
If I can change two, then I can change four.
If I can change four, then I can change eight.
If I can change eight, then I can change.
What one man does
will change another, either obviously changing his personality, thoughts and actions, or something more subtle.
La humanidad aspira!
La humanidad aspira y el extremo está cerca!