I do believe it's possible; but it isn't going to happen in the next, say, ten years or so (that's for sure). A lot of ignorance and aggression has been reduced since earlier times; but there's still "mild levels" of ignorance and aggression among people who don't even realize they have those things in them. Gradual education of people who are already grown will probably keep happening, but more education (and better, more peaceful and more understanding thinking/approaches) can continue with each new generation of babies born. Improvements in attitudes and thinking can take place a lot more quickly than one would often think they can. I think peace (as with so many other things) can have more of a snowballing effect than people would realize (until/unless they see how it can go on).
People aren't designed to be ignorant. Someone just doesn't teach them. People aren't designed to be aggressive. Someone just hasn't raised them not to be aggressive at all, or else someone hasn't taught them not to be.
The first thing the world has to figure out, though, is that those who are not aggressive; and those who are kind and respectful of others and the world, are not "too stupid" or "too weak" to be otherwise. The world needs to figure out what REAL strength and REAL power is, rather than keep hanging onto ancient thinking that doesn't recognize that human beings who think the way to live is "by the laws of the jungle" are not the strongest, wisest, or most worthy of power. Some people have learned that already and in the past. There are still more who need to figure that out.
I don't believe that Nature (or God) designed human beings to be the sorry state-of-affairs that so many are, even after all this time on Earth. They can be better than that. Things have gotten better throughout the ages, and I think they'll keep getting better.